actually it might just be an aesthetic adjustment and a bundled in camera attachment... the 512 MB might not be accessible in games and might just be for the sake of storing photos. Or it might just duplicate the function of the memory stick.
Giving Sony the benefit of the doubt, they're just trying to tantalize gadget buyers the only way they can... more features. One assumes if they were capable of getting good games on the system, they would've done so already. It's never going to compete with the DS on the basis of software, so they're trying to make it the swiss army knife of portables. It's a video player, it's a digital camera, it can theoretically play some video games. The problem of course is that multifunction systems usually don't do a particularly good job at anything. The question is, if you didn't want a PSP in the first place, will adding a camera change your mind?