There are a few surprises in the North American developer/publisher list. A quick onceover reveals the involvement of Armature Studios, the Austin-based company formed from Retro's leads; Bit.Trip developer Gaijin Games; N+ developer Metanet; Skullgirls' Lab Zero Games; Mark of the Ninja's Klei Entertainment, and even Retro City Rampage creator vBlank Entertainment.
Those are just some of the 47 North American companies – roughly 96 companies worldwide, including duplicates like Bethesda's North American and Japanese operations – working on something or other for PS4. That's not to say all the projects will be released. Remember Fifth Phantom Saga?