I use fish mainly just for the quality of life increase that its predictive features and command history give. I also really like that it uses functions to play the role of aliases, and it's super easy to write and save new functions on the fly.
That said... I haven't put in the time to really learn its nuances and I still write shell scripts using bash. Maybe I'm doing it wrong, but it works for me.
Honest question; why would someone need a touchscreen, or a display at all beyond a battery indicator, on their earbuds case?