During the recent CES, Microsoft announced a new Game Room feature for the Xbox 360. The new Game Room will be similar to what you find on PlayStation Home. Games would be playable in this new arcade and players will get an older styled arcade feel.

These games featured in the Game Room will be very similar to those found on XBLA. However, these games in the new Game Room will not be compatible in the Game Room. I guess if the game was good enough to play once it'll be good enough to buy once it'll be even better if you buy it twice.