So you have 100,000 apps of which 80% are probably never used or downloaded. Which means you have 20,000 that are simple math.
most classic games just do not seem to lend themselves to touchscreens. The DS tried to have some touch friendly platformers and they just were not good. Something similar to Age of Empires would work well with a touch screen I would think
The Droid uses a really nice chipset and Android 2 uses gl2 so I would think it is capable of some pretty good graphics (and there will be some really nice titles coming...from Gameloft for one) and maybe just maybe an MMO in the future.