To throw some numbers in:
The Ti-84+SE has only 2.5 mb of flash and 24kb of RAM.
The TI-83+ has less than 1mb of flash and 24kb of RAM.
Now, what music you can fit into that, is not decodable in realtime on a 6mhz (83+) or 15mhz (83+se through 84+se) using an mp3 or ogg codec. (At least not at any bitrate worth listening to).
To neilt6:
I personally play a game called Desolate which uses flickerless 4-level grescale and animated tiles.
If you don't feel like creating your own games which do not have the side effect you do not like and yet still want to play games, perhaps you should invest in a gameboy or psp and use the calculator for *gasp* calculations in math class?
On a side note - That blur is the only thing which makes grescale possible on a monochrome display (older ipods, ti-calculators, etc.)