The reason you buy a Nexus phone isn't just because it's the best Android phone. It's a pure distillation of everything Google has to offer. The best Android can possibly be at a given moment in time.
But that won't be the case for the Galaxy Nexus on Verizon. It'll be missing a pretty big chunk of Google's vision of the near future: Google Wallet. Wallet is precisely the kind of thing that the Nexus is supposed to be about—a pulsing little slice of the future, straight from Google, in your hand.