These are very cool devices that I would buy to play around with but, I don't really understand the idea with a hingeless flat screen. That can promote a very bad posture if used on a table as one needs bend the neck to see the screen. Sure, these could be used in handheld mode but how much can you type with thumbs only before you want to use more fingers??
I think the DevTerm is more supposed to be hung around your neck like a hipster. ;) Or, duct-taped to the datacenter wall for when its time to minicom the hell out of things.
https://www.clockworkpi.com/devterm