But, would I drop $500 bucks on it? Unlikely. I'd file this under "Cool toys for people who have more money than sense".
Imagine being able to control things in your office or home remotely from your watch... What’s not to like?
With sufficient reliability and bandwidth for wireless connectivity, this likely would be the end-game for such devices. Eventually, you have a single device that acts more like a “key” than anything else, although it would essentially double as a local I/O terminal (microphone/speakers, camera/screen) as well. You’d need little local storage space if everything were accessible on demand from “the cloud”.
If you need a real screen & keyboard combo, the desktop terminal you sit in front of uses your settings and data fed from your “key”. The TV set knows what videos you’ve bought or uploaded by accessing your “key” info; likewise the home or car stereo can access your music and audiobooks. And so on.
To a large extent, this can already be done with (using Apple’s ecosystem since that’s the article subject, but there are other similar - if slightly less integrated - approaches) iCloud and iTunes and compatible devices (Mac, iOS, and Win7 or later), though cloud storage capacity and reliable connectivity for mobile devices are limiting factors. Also, they still only tie existing multiple “accounts” together, that is, my PC profile and my iPhone are two distinct “accounts” for me, although they are linked by iCloud.
What we’re looking at here may be the actualization of the old Sun Microsystems slogan: the network IS the computer, but the technology isn’t there, not yet at any rate, and not affordable enough for widespread adoption.