"magic the gathering"
Card trading with use of the compass to flick cards to other pads and iphones around a table would be cool. Has no one made a non flash magic the gathering game for a browser yet? Seems like someone would have tapped that market by now.
"a 3D star trek chess perhaps? "
Yeah a strategy game is where I want to go all right. A new battle chess would be fun too.
2 players sharing the screen seems like a good mechanic to exploit. So you know the air hockey games are going to flood in. Flick Subbuteo football seems like a winner too.