Man this has come a long way. I remember my first Pi I wanted to do this SOO badly. I wound up doing it with a 48w/hr battery and a 7" non-touch automotive backup camera screen. [1]
This was just after the launch of RPi1 and well before Adafruit had all the cool parts that just work out of the box.
[1] https://www.honestrepair.net/wp-content/uploads/2018/04/Micr...