Well, my understanding of Sony's gaming division is that they use the profit made from selling the ps2 and psp to off set the loss of selling the ps3. So, if they dropped the ps2, they would just find themselves suffering a lot of loss, especially if their increased focus increases sells which would then increase their loss.
I think the ps2 will be around until the ps3 makes enough money that it can sustain several price cuts and still be making money. I think this is also one of the reason's that Sony removed the BC, because they want people to keep buying ps2's. Jack Trentton even said the BC didn't cost all that much and by taking it out didn't really reduce the cost of making the sytem signifacantly. (He was refering the software emulation used in the first 80 gig models)







