Is there any other smartphone that's better for me, if I'm primarily interested in games? I suppose all models support Google calendar and email.
If you already have a smartphone, just get the new Touch (or even iPad if you must) for iOS gaming. The A5 processor puts it on par with everything released. The only question is RAM, but honestly I dont see that being an issue with it supporting all it does.
If you don't, then the 4S will suit you fine, unless you really want the 5. Many developers CAN'T develop exclusively for new devices, since many people have old units and they're potential money too.
Android is pretty shit for games. Everything gets ported over to iOS because they want to actually sell some games.