The biggest incentive for SCE to implement PS2 BC would still be so that they could sell PS2 games on PSN.
As for the hardware BC, it should have been pretty obvious that removing the EE and GS would be the easiest way to drop the cost of the overall chip set, which has really been one of the biggest challenges since their Day 1 $840 manufacturing cost debut.
Hardware PS2 BC is gone for good; there's no rolling back the clock on that issue.
But it is very safe to say that people will be able to buy PS2 games via PSN in the future that will play on every PS3.
If it works with PS2 disc games, great; but by that time they may not even be in wide production and distribution and I see little reason for SCE wanting to improve the market for used PS2 games that they don't make a cent off of.
The soft BC on the 360 was not a concerted effort; it was merely to ease the transition of weaning gamers off the original Xbox following its premature demise. As for selling Xbox classics through XBL, I'm not sure what the point of that was other than as a DD market test, seeing as how that effort was even more half-assed than the previous game disc emulation.







