I have a use case:
Exhibiting software at events. I need high-end hardware to show off demanding software. Need both a good CPU and a high-end (consumer-level) GPU. I don’t care what the computer looks like (as it’ll be hidden inside a stand), but smaller is better, because I’ll be needing to cart the thing around from one event to another. And for that matter, if I can just pop it into my bag at the end of the day rather than needing to leave it on-site overnight (for multi-day events), that’d be fantastic for my ease of mind. There’s no end of stories of hardware going missing, between days of multi-day events.
Also, I don’t care whether the machine runs Windows or OSX (or Linux, for that matter); the software I exhibit runs on anything. The size and weight and power of the exhibition machine are really all I care about.
The speculation in the linked Engadget article makes it look like even in its highest configuration, this particular computer doesn’t have the graphical oomph that I need, so it’s not a contender. Will continue to keep my eyes open, though.