Here's a thought:
Its the same phone having support for both GSM and CDMA.
I'm hoping I can buy the "universal" nexus sold through Google play without a contract for sprint.
Next summer I still have an upgrade, or can choose to take that phone to ATT, T-Mobile, or any of the 3s prepaid carriers if network vision isn't up to par
That would also mean upgrades directly from Google. A true nexus experience (something Sprint and Verizon's were lacking previously)