In an effort to 'actively' avoid repeating the mistakes made with PSP, Sony is said to be discouraging developers from porting console games to Vita.

That's according to Sony's marketing VP for handhelds and consoles John Koller , who has told Gamasutra that while the message for the two portables is similar - 'console quality ports on a handheld' - Sony is working to avoid making the same mistake of pushing out ports.
"The issue that happened with PSP is we got overrun with ports," said Koller. "It became very difficult for us to define what made PSP unique. The content development became a bit unstructured or decentralized, in that we got a lot of content that was on PlayStation 2 and got thrown over to the handheld."

Koller goes on to state the importance of these 'console experiences' being unique to Vita. He says the handheld "isn't something consumers play because they've left the living room. It's something that [needs to be] unique, and defines the Vita experience."

The evidence of Sony's guidance so far is questionable. While titles such as Uncharted: The Golden Abyss, WipEout 2048 and Resistance: Burning Skies have represented solid Vita-exclusive efforts from Sony-only franchises, many other Vita games have simply been small-screen ports of console titles.

Koller looks to the future, pointing to games such as Call of Duty Black Ops: Declassified and Assassin's Creed 3: Liberation - two major console franchises coming to Vita with all new games. "The messaging is similar [between PSP and PS Vita], but I think the output is going to be quite different," he assures.