Generally, you're stuck with the camera you buy. You can always edit the pictures you take to make them look better. Try PicSay Pro or Photoshop for hardcore editing or Instagram for super simple filters.
I've tried this new G Wallet apk: http://forums.androidcentral.com/verizon-galaxy-nexus/196642-new-google-wallet-apk-link-inside.html
And it is glorious. It's what Wallet should have been all along.