i will never, for the life of me, understand why so many people continue to refer to the Game Gear as "just another failure". I just don't get how anyone can see a widely supported console, that was around for six year a failure. No it did not dethrone the Gameboy, but it was a very successful product. The one and ONLY reason that the Gameboy became such an untouchable product is ironically the fact that nintendo left it for dead for several years, letting it cling to life bya thread. Suddenly Pokemon comes out, and Gameboy is revived, meanwhile, the competition decided handheld gaming was dead and are nowhere to be seen.
End rant.
Anyway, point it, you cannot lump GG in with all the other failed handhelds. I question whether you can even consider the Wonderswan or Neo Geo failed, they both had respectable runs.
As for sony PSP, not sure how an n-gage thread got turned into a PSP thread, but while I would bet any money that the n-gage is DOA due to the crappy design of the system, and the poor wuality of the software, I would also bet any money that the PSP will be at the very least a moderate success, and most likely much more. It will have a good design, and it will have good software. That makes all the difference in the world.
Insidently, the same principle works for Nintendo, I love the SP so much, I' buy one is every colour if I could afford such extravegance.