So the cool thing about using one device is that all the stuff you use everyday is right there, even when you are on the road.
No it isn't. I use desktop applications on a computer, not phone apps. And if the stuff I use is there, it's on a laptop, which is nothing new.
Another cool thing is built in 4G service. Since you are using the phone directly you have whatever data service your phone has but on a desktop computer environment.
There's litterally not a situation I can think of other than an emergency or extreme 'make do' where I could see that being preferable to a REAL desktop computer environment (that's insanely faster/more powerful) hooked up via ethernet or at the very least wifi that's both faster and unlimited.
The capper is that pound for pound even a modest desktop computer is way more powerful and much cheaper than the best mobile device experience which is going to cost a lot more.
(TLDR: a $300 PC will whip the ass of a $1000+ phone by just about any measure.)
Then there's perks like driving multiple monitors...
Since we are talking a fixed desktop PC location here, all the PC benefits apply. Traveling, a laptop wins hands down. Who's lugging a full sized monitor/setup with them?
Not trying to be a naysayer, I'm just not seeing how mobile-becomes-desktop is much more than a fun gimmick. Now, I'm all for fun gimmicks, I'm just not buying the (as of now) fiction that it really could be a viable desktop replacement for most people engaged in any serious work. May change in the future.
To me, what would be a lot more interesting and practical, is if phones could just better integrate with existing PCs better and harness their power.
For example: I'd love to be able to attach my phone to my desktop and have apps like the messaging services integrate right into the PC. So if I'm texting someone, the texting interface is connected and active as a PC or Mac application, seamlessly. Or a phone call just plays straight through the desktop audio system, and all notifications pop up on the desktop OS's notification system.
And of course drag/drop seamless file system.
The phone trying to BE the desktop seems a bit silly to me, but logically intergrating with it in a totally seamless way without the shuffle of any third party voodoo... now that would be interesting.
Closest I've seen to this is Samsung's SideSync, which is pretty useful, but I'm talking a total OS integration .