
While not a full evaluation, this is a quick overview comparing the 3D graphics power of all three of today's mobile gaming platforms.
While the iPhone 3GS is significantly faster than its predecessor, it definitely has a long way to go before it can catch the PSP. However as the DS (and Nintendo in general) has shown, you don't necessarily need the best graphics to have the best games.

New Chrono Trigger Form-ism figures of Crono and Marle have been showcased at a Square Enix pop-up store, with pre-orders expected soon.

Growth driven by digital software and console hardware sales.
To celebrate Tomb Raider: Legend's 20th anniversary, the official channels have shared an early in-development gameplay demo.
also compare it to the Pandora :)
So the psp is the king of graphics in handheld consoles for now..
i think ill stay with my iphone 3g and psp thank you very much... although the new go looks interesting ;)
iPhone wins by far. =]
The person who wrote the article guesses that the GPU for the iPhone 3GS runs at 200 mHz, while the Anandtech article that he quotes estimates that it runs at 60 mHz, as it is an MBX-lite- meaning that it is running at a slower clock speed to conserve energy (battery life)
If that is the case, then his graphics power comparison is off by just a tad.