As you can see from the picture above,grabbed from Gaming Bits =P...they changed its design a little...its look more rounded,and a slight recess in the middle of the button,picture 1 from the leftand the L1 R1 button have slightly higher then the psp2000,that let you easier to press and feel more comfortable...and the UMD cover at the back of the psp3000 have a bit change from the decorate design...the ring get slimmer,its dose not have any function...but on my thought...its good,because the ring of my psp2000 is too big to get scratched,sad....
For me,i have a psp2000...there always a problem when i playing under sun light while waiting at outdoor...its hard to see the screen,its dark...for the new psp3000 they have already improved to an antireflective screen, which enables users to see the screen more clearly in well-lit places, even when used outdoors, the screen improvements don't stop at the antireflective screen. Sony has apparently also doubled the response time, improved the contrast ratio, and bumped up the color gamut.
the changes from the screen to design may considered as upgrade...but here really an add on for psp3000,they added a microphone for psp3000...its a great new for those who using skype on psp2000 or psp1000...i read it from the forum,there some ''pspers'' bought this new product already say that its can pick up the voice very clear with no necessary to put near,sound great =P...and its has a better cable connection this time...because the psp3000 can connect with your pc even if you were playing game...and you can now enjoy your game on a regular TV using a composite cable,its let you to enjoy your gameplay if you are around home,or share thing with your friends =P,anything else just as before...as you could see from above...there maybe some problem occur on the new psp3000...it show scanlines on sudden scenes...there some explanations here. i think that is no need to upgrade to psp3000 if you aleardy owned one,if not you can get a hand on it now =P...bye then,have a nice day =P