I recently called Sony about this issue. They informed me that they currently have no intention of making all models of the PS3 backwards compatible. Now that doesn't mean that they won't make it to where you can play PS2 games on all modles. However, I would assume that they will probally do the same thing they are doing with the PS1 games and just start adding PS2 games to the PSN. But we will just have to wait and see what they actually do.