Even if the screen is small (it's the same size as the GBA screen, I think), there's two of them. How could you possibly go wrong with that? Imagine the possibilities! Actually, you don't have to imagine: Sonic Rush offers all the mind-numbing-dual-screen-action you can handle. Give that a quick whirl and tell me what you think of the screen size.

Anyway, I guarantee you'll be satisfied, unless you don't like fun video games. In that case, buy a PSP and watch movies.