He is suggesting a project idea. It would be nice indeed, although kinda hard, due to all the unavailable commands on one calc or another. Screen size might also be a similar issue as what will happen when running TI-83+/84+ BASIC graphics on a TI-84+ C Silver Edition. It would most likely still be feasible, though, or maybe there could be a TI-84+ emulator for the PRIZM.
Or maybe an Axe Parser to C converter or something.
There was a small early stages tutorial on how to manually port 83+ BASIC games to Casio BASIC, but I don't remember where it was on the forums.