If you have one of the few phones on the market that has an NFC chip built-in, like the Nexus S 4G, it is likely that you may soon see a Gingerbread update to version 2.3.5. That new update will bring the much "ballyhooed" Google Mobile Wallet features to your Android device. Of course, you still can only use those features at retailers that adopt the Mobile Wallet technology into their register systems, but the push for that technology will hopefully be getting ramped up soon. The source link below has more pictures of Google Mobile Wallet, but here are a couple to give you the gist of it.
Source: Droid-Life