If they really were thinking about customers, the contract would be a no-penalty cancel-anytime-you-want contract that would lock you in for a specific price for a non-trivial amount of time.
I'm skeptical and will stick with AT&T out of laziness for a while. Prove me wrong T-Mobile and I'll switch. But even though cellular has been one-sided customer-screwing contracts since the inception of the service - contracts can actually protect _both_ parties if you do them right. No contract == No guarantee.