It's definitely neat, but I feel like this has been done before without success -- examples like the Motorola Atrix, Windows Continuum, and even the cancelled Ubuntu Phone come to mind. (And, going further back in time, let's not forget the Palm Foleo!) It seems like a neat idea on the surface though, so I wonder why as a concept the phone-connected-to-desktop-peripherals thing hasn't gained more traction. My suspici…
Same thing with the built-in Linux desktop on a Asus motherboard I had, I don't even remember the name of the thing.
I believe the concept is here to stay, but like tablet PCs back in 2003 it did not find its niche yet. There aren't just too many occasions you'd have a mouse, a keyboard, a monitor, but not some kind of x86_64 computer near.
Still, it's likely the breeding ground for a number of innovations and it may finally catch up...it just does not make so much sense to me to include only on the flagship products: why would you cut so much people on the mid range out of a feature you don't even know if and where will catch up?