What sold me is the 2 thumbsticks, lol. This thing looks awesome! I'm not sure if this link was posted yet, but there's a couple of gampelay vids on the bottom http://www.engadget.com/2011/01/27/the-sony-psp2/
battery life is rumoured to be between 4-5h source: http://www.eurogamer.net/articles/2011-01-27-sony-ngp-battery-life-good-solid and kotaku just posted a better uncharted shot, looks great!