In the late 1970s, Jef Raskin, a pioneering technologist who was one of Apple's earliest employees, sketched out a radical vision for the future of computing.

Computers, he argued, should work like home appliances. The ideal computer would require almost no learning curve or upkeep. You wouldn't have to upgrade its operating system, say, or install different programs to do things.

Instead, like a washing machine or a vacuum cleaner, the device would perform a narrow set of useful tasks with the push of a button or two.

Raskin started a project at Apple to realise his vision - the first cheap, easy-to-use computer for everyone. He called it Macintosh after his favourite type of apple, and he assembled a legendary team to build it.

But it was not to be. Raskin's vision clashed with the loftier ideas of many at Apple, including Steve Jobs, who eventually took over the Mac team and steered it toward building the general-purpose personal computer that redefined the technology industry.

Alienated and frustrated, Raskin left Apple in 1982, and spent much of the rest of his life trying to create the "information appliance" of his dreams. He died in 2005, never quite getting there.

But now, all of a sudden, Raskin's information appliance is here, sitting on my kitchen counter.

Welcome to the Show

It's called the Echo Show, and it is the latest incarnation of the Echo, Amazon's voice-controlled smart speaker that has become a surprise hit. The Echo Show is easy to describe; it's an Echo with a screen, and you control it the same way you do any other Echo - by talking to Alexa, its cheery assistant.

As my colleague Brian X. Chen wrote in his review, the Show is far from perfect; it has some bugs and you get the feeling that Amazon is still searching for a killer purpose for it.

But these are quibbles. The Echo Show is a remarkable machine, not just for what it is now but for the way it clarifies Amazon's vision of the future of computing. It is becoming the model for a new kind of communal, household computer - a resurrection of Raskin's idea of an information appliance, as opposed to Jobs' vision of an all-purpose personal computer.

One measure of the power of this vision is how quickly Amazon's rivals are racing to copy it; both Apple and Google have their own takes on the Echo.

It's questionable how far these rivals will get. Amazon's business model, which depends on millions of households buying millions of goods, is uniquely suited to selling Echos at low prices, because Amazon is certain it can make money on the device from extra Amazon purchases. (The lowest-priced Echo, the Dot, sells for $US50 ($66); the new Show, available to the public as of June 28, sells for $US230, but you get $US100 off if you buy two.)

What's more, Amazon is far ahead. The Echo is much more useful than Google Home, which was released two years after Amazon's device, and the Apple HomePod speaker will not ship until the end of the year.

Given that lead, the Echo is beginning to look unstoppable. It is well on the way to becoming the operating system for suburbia.

Using your voice

I suspect you're scoffing. The primary knock on Raskin's information appliance was that it didn't do a whole lot. This is also the main criticism of the Echo and, now, the Echo Show. These devices can't do anything you can't do on your phone, personal computer or tablet.

That's true, but it also kind of misses the point. You can make toast in the oven, but you have a toaster because it's designed to perform a specific task reliably and without any fuss.

That's the point of the information appliance, too. There's a whole lot the Echo Show won't do. It won't do email. It won't do the web. It won't play first-person shooters. It is emphatically, purposely not a general-purpose computer. But what it does do - play music and videos, make video calls, tell you the news, tell you the time and weather, and shop at Amazon - it does with such surpassing ease that it feels like a magic trick.

There are a few reasons for that. One is the Show's unusual and quietly innovative interface.

Dave Limp, Amazon's senior vice president for devices, told me that when the company was first designing the Show, it tried to use the same interface that it used for its tablet computers. But the team soon realised this didn't work.

For one thing, the Echo Show is designed to be used just with your voice - the screen adds extra information, but you have to look at it only when you specifically ask for visual information (such as when you want a video). A standard mobile operating system, which is heavily visual, just wouldn't work.

Another reason a tablet interface wouldn't have worked is that it felt too much like a computer, and one overriding design goal of the Echo and the Echo Show was to hide any relationship to anything computerlike.

Always in the same spot

The Show's operating system, memory, storage and other specifications are completely hidden from users. The Echo does have a version of apps, known as "skills," but they aren't anything like smartphone apps.

You install them just by asking Alexa to enable them, and when you want to use one, you just name it. To watch a video, you just ask for the video - you don't load up a web browser or the YouTube app and then search for it.

"It's a very different mental model than the traditional computer, smartphone or tablet, where you have to think of which app you want to use and then open it and then dive in," Limp wrote in an email.

The Echo Show has one other advantage over smartphones and tablets: It's always there in the same spot.

Your phone and tablet move around the house. Often they are nearby, but sometimes they aren't. That uncertainty makes them less useful for the kind of ambient computing tasks the Echo is good at. When you are in the kitchen and need to look up a recipe, you could find your iPad to call it up. But the Echo Show is always there, so you and everyone else at home come to rely on it - you know that when you call out for it, it will always answer.

Such communal, stationary devices are not unusual in our homes. All the appliances are stationary and communal, from the fridge to the washing machine. We also have some appliances whose sole purpose is to provide us with information and entertainment -  bedside clocks and TVs, for instance. Limp said these informational appliances provided a "mental model" for the Show's design, which got me thinking about the expansiveness of Amazon's ambitions here.

The Show has an 18-centimere screen. There's no reason the screen could not be slightly bigger - an iPad-size one that clings to your bathroom mirror, for instance. Or it could be much, much bigger.

In fact, let me go out on a limb: Within a couple of years, I bet Amazon will make its own TV that will work just like the Echo Show. Because if you are trying to create the perfect home appliance, there is no better target than the biggest screen in the house.

The New York Times