Thats impressive, extremely impressive given the size of the screen (and hey, the 50% brightness they had it on will be as good as most other screens on 100%).
I would love to know what other processes were running in the background.. i.e. comms etc. Just imagine how long this phone can actually run if not being taxed by showing video content!
Its not only the screen. The move to a 45nm CPU (vs 65nm for competitors) is going to be a huge energy saver.