Microsoft are 100% behind the idea of allowing users to download full, retail copies of Xbox 360 games. But the PS3? Hmmm.
Despite the fact Sony essentially pioneered the idea on home consoles, with games like Warhawk, GT5 Prologue and Siren (and EA's Burnout Paradise) already available for download, when it comes to adopting the concept as a full-scale service, Sony's Eric Lempel sees some problems:
It's not something we have planned, just because the size of the games is massive. With Blu-ray we can put up to 50 gigs on a dual-layer disc, while [Xbox 360] is still on a 9-gig media. So technically it's possible, but I think the issue would be, 'Do you want to download 40 gigs and keep that on your hard drive?
Uh, fine, but what about the games that don't take up 40GB? If multiplatform games are going to be available on Microsoft's store, but not Sony's, it's going to make that comment look a bit silly.
Interview: Sony Not Playing 'Catch Up' with Xbox Live Anymore [Industrygamers]