Considering Sony's PSP successor is yet to be officially unveiled by the company, you can't expect PlayStation boss Kaz Hirai to speak at length on the PSP2. What he can do, though, it speak briefly.
In an interview with the New York Times, Hirai gets talking about what future PlayStation Portable games might be able to offer, and says "Depending on the game, there are ones where you can play perfectly well with a touch panel."
"But you can definitely play immersive games better with physical buttons and pads. I think there could be games where you're able to use both in combination."
You don't say. Remember, the PSP2 is heavily rumoured to be packing a combination of traditional controls and a touch-sensitive device on the back of the unit.
Clues About the Next PlayStation Portable [NY Times]