If Mac offered an “External” keyboard with a Touch Bar — would you see a use for it? Personally, the idea of combining a mini-display with a keyboard sounds like something Raspberry Pi users would want.
Or anyone needing a quick Dumb Terminal session. Or anyone with a 60% keyboard (HHKB, Pok3r) who decides they function keys, after all. Heck, you’ve got most of a functional calculator / word processor and, without the laptop network options, you could make a case for using it at school / in exams.
Just add a battery, to allow use without a computer connection.