ok, then we have different opinions. I don't think that doing everything other device do is enough, even if you do it better, because poeple will have a high price tag to pay for something that they kinda already own (e.g. when they have an iphone) but with "slightly more/better".
Being "better" meant in the past to offer better visuals and that was something that really improved the experience, you could have n-times the polycount on PS2 compared to PSX, and while poeple couldn't really understand just the number, they saw some games with way improved gfx and gameplay possibilities (e.g. GTA3).
So "better/faster" was quite an argument, but now that you can play your NFS, CoD... on all mobile platforms, having some more polys, some better shader, higher res screen and input-gimmick-devices that don't change the experience, is kind of just a check-list feeding.
I don't have an NDS, but I really consider to buy a 3DS, just for the sake of the 3d screen (and I hope there will be some homebrew for it).
I agree with you, that the PSP2 should do everything that all other device already do, but that's something mandatory, it's not like a feature that would make me buy it. Even if the PSP2 could play fullHD movies on the display and would have 3 cams pointing in every direction and the whole case would be covered by touch sensitive sensors and running android, it wouldn't be as much of an argument like just offering GT Mobile 2 at launch.
even from a programmer's point of view, I feel less and less excited. It sounds like it would have the usual mobile hardware, maybe more powerful for a year or two than iphones, but that's just a matter of time.
I hope sony has some secret ultimate feature that can compete with the 3DS.