Not surprising really, they didn't halt manufacture on the PS3 60gb models with b/w compatabiliy due to costs. Its because far more money can be made from reselling the games via PSN.

I imagine PS4 will be the same, but with PS3 classics available through its variation on the PSN store.

Yeah it would have been nice to just sell the PS3 and fund that towards the PS4 and have one system.

But they did say "in the future" they are planning to support PS1, PS2, and PS3 games through Gaikai. Maybe once broadband gets better for more consumers.