Stuff like a pretty case with slots for optical drives, a laptop with a shitton of ports and all-day battery life or anything else that seems to go against the trends.
This thread is for complaining about how you can’t find it and (maybe) finding it thanks to someone else.
I remember the Ubuntu Touch had a feature like that that kinda worked, but they never fully commited to it.
As for doing it through Termux, I’m not convinced that X11 works terribly well in Android for it to reliably extend a display to another screen. I’ve never tried though, so I could be we way off