Well, if the PSP screen is indeed same technology as those in Sharp's expensive LCD TV's (ASV), then it should be perfectly visible under normal lighting conditions. Direct sunlight will be a problem, as is expected with LCD screens.
I've heard that these new LCD TV's and monitors already have a very good picture, some even say they are in every respect equal to CRT displays when it comes to viewing angles and colour reproduction....
Again, my poit was that it is no news increasing the brightness of a lcd in a portable limits the maximum battery time.
Just because some device has no adjustable brightness, doesn't mean a device with one is automatically better with regards of battery life.
How does the DS maximum screen brightness compare with PSP's?
Will the DS screen be better visible in bright sunlight with it's default (non-adjustable) screen brightness, than PSP with it's brightness adjusted at minimum?