If it's true, then I believe the reason is so Sony can take advantage of rereleasing titles such as ICO, SoTC, Sly cooper, GoW1&2, Jak, etc on PSN when their respective sequels (or prequels) are out. Perhaps we'll be seeing an influx of older I.Ps from Sony now.
Rereleasing PS2 titles on PSN could be a great way to build up hype for upcomming games for 3rd party devs aswell. (AKA MGS2, Persona, FF, or possibly KH)
This could be huge for PSN, in terms of increasing its and the PS3's value.











