What are those games that you would love to play on the GCW but that, for some reason or another, you probably won't be able to in the near future?
Mine is Tetris The Grand Master 2. This is the most modern Tetris GM game that runs on MAME and it's amazing, but there's a catch: Normal MAME doesn't support it, you need to use shmup MAME or other variants if you want to play it. Which is a shame because it's probably the second best Tetris game ever made and I could see many dropping some cash just to play it on the go.