Chris Metzen of Blizzard Entertainment was a surprise guest on the PlayStation 4 stage tonight, revealing a strategic partnership with Sony to bring Diablo 3 to the the PS3 and the next-gen console.
Metzen said Blizzard had its roots in console with Lost Vikings and Rock n' Roll Racing, and it had "a deep desire to get back into the mix." After much discussion on which title could make the jump, it was decided it would be the company's latest action-RPG.
The company has said it has been working with a console port, and Metzen mentioned that the inventory interface and control over the avatar were already working on the PlayStation 3. He also talked briefly about four-player co-op mode in full screen with "one couch to rule them all."
No mention was made that this was exclusive for PlayStation 4, so it is possible that Blizzard could bring the game to other consoles as well. More details on the game will be coming PAX East in mid-March.