The hardware looks awesome, but it would only be worth it to me if it ran Linux.
It may be a neat gadget, but it won't replace my Z. Anything that wants to replace it has to be pocketable, have a clamshell design, a keyboard, a touchscreen, and run Linux.
This seems to hit most of those, except for the pocketable part. That is crucial for the carry-anywhere factor of the Z.