I used to own an AlphaSmart. I think it was the Dana model, which ran palm pilot apps I didn’t care about, but had higher resolution / fit more lines of text on the screen. It’s probably in storage – it wasn’t a high priority to keep track of that when I consolidated my belongings. But I never considered that it might have artistic uses (outside of undistracted writing, which was largely the point).
I doubt there are any palm pilot apps that integrate with Dana’s “keyboard out” functionality, but if you can dig up an SDK, there might be some additional potential there.
It’s an interesting thought, to be sure…