Have you seen this? http://pgslab.com/

It's billed as a handheld gaming system but you don't have to play games on it.

Runs Windows 10 on a 5.9-inch 1920 x 1080 screen. Atom processor.

Whether it will lever get made is another matter (it's an ex-Kickstarter project now taking pre-orders), but the approach is interesting.