I, for one, welcome this kind of approach. I'm fed up with laptops that try to be tablets (Windows 8) and tablets that barely tolerate keyboards (iPad). Something that is compatible enough to, say, run Office for Android, a VNC/RDP client (Jump Desktop works great on Android and iOS) and the occasional terminal window would be enough to do a _lot_ of my work.
(I'm actually typing this on an iPad mini, with Microsoft's RD Client and Panic's Prompt in the background...)
The only thing I'd _really_ like to see in this OS is the ability to split the screen vertically (like Modern does on the Surface).
If the build quality matches the looks, I will certainly take a look at one. $349 (quoted on Liliputing) seems pretty decent for a Surface "clone".