I would love for a widespread PalmOS revival! I'm not talking so much about the devices, as the whole experience. The exquisite UI, the distraction-free atmosphere, the lack of ads and dark patterns like tracking, the elegant simplicity, the efficient Graffiti language, and, yes, the reprogrammable physical buttons.
I'd love to have it running on a watch, and the watch can be used to input Grafiti or whatever its called. A PalmOS watch would be a really nice counterpoint to the hegemony of Apple Watch. But that's about as likely to happen as an SGI Irix laptop.
Fossil watches actually released a palm-based watch
https://en.wikipedia.org/wiki/Fossil_Wrist_PDA nobody could out-nerd me with that watch that lasted only a few hours per charge.