To go on a tangent, even though my personal search for the ultimate handheld computer shall never be concluded, I feel like I found a lot of the things I've been looking for (specifcally in Zaurus and the Psions) in my 7" GPD Pocket 2, which incidentally (paired with a keyboard and screen) is my main machine these days, yet I do carry it in my jacket's inner pocket to do some programming on the go.
It runs Linux, is run-of-the-mill Intel-based ultrabook somewhat on the lower end (Core i3, 8GB ram, 128GB disk), with indeed its only non-boring feature being its size. Build quality, battery life, etc. is all on par with big-brand ultrabooks.
I have a GPD Pocket 2 and I want to like it _so much_, but I just can't get used to the keyboard layout. Everything about it is perfect except for that, but since I just program directly from the framebuffer a keyboard that I can't get used to and use intuitively is pretty much a deal breaker :(
It runs Linux, is run-of-the-mill Intel-based ultrabook somewhat on the lower end (Core i3, 8GB ram, 128GB disk), with indeed its only non-boring feature being its size. Build quality, battery life, etc. is all on par with big-brand ultrabooks.