The Gametrac is going to be cheaper than the GP32, and I wouldn't mind owning a GPS system, so I don't mind if it comes built into my game system. Thats one less thing to carry around.
A camera is also fun. Phone picture messenging is extremely popular, so this is not a redundant feature.
Though, it always comes down to one thing for me. If the Gametrac requires a constant network connection in order to be reasonably functional, then I will be extremely pissed. There are so many areas of life these days where people are not happy just taking your money and giving you a product in return. Instead, we have to sign up for yearly, monthly, weekly payments. The TiVo being a prime example of this. If you buy the device, you get a bog standard PVR, but if you pay monthly fees (and huge ones at that), you get a PVR with some extra features. Some of those are already built into the system. For example, if you want to stream your TiVo broadcasts into multiple rooms in your house, you have to pay monthly charges for them to enable this option in the devices you already own. What the hell is that?
Basically, if the Gametrac is reasonably functional without network connection, then I will get it and be very happy with it. But if it needs a connection, then I will get it, but I won't open it and it will go into my collection of failed handhelds
.