Now here's an interesting rumor! According to people who have allegedly seen the next PSP behind closed doors at German gaming expo GamesCon, the new handheld will feature touch controls on its back.
That means you'd be able to hold the device like you do with a current PSP, but swipes and gestures made on the back could register as input as well. Cool!
There aren't many other details available at the moment other than that it'll have a "rich and detailed screen," which is kind of obvious. It's also not clear if it would come out in 2011 or if it would be even further into the future. We'll see!