If people are on the move they are very likely to find this more usable. As I said: you get your tablet on your way there and you get your laptop when you get there. That's basically the whole idea of the concept for me and how it should work. All you need is to bring the Surface + charger + 360 controller in order to get pretty much the same setup you'd have at home, albeit less powerful.
Expanding on this: if people get that attached to the thing because their work implies travel, then it surely could end up being their main PC (getting used to that desktop, having everything in there if they dont use the cloud) and replacing their home one, since it would lose it's purpose.
It's not as far-fetched as you think. Many people only have iPads for their computing needs, this only expands on that aspect.