Thoughts from the iPhone Recruiter:
What happens if you are using tethering on your Verizon iPhone and a call comes in?
Of the 1000′s of iPhone Apps that are meant to be used…WHILE you are on the phone, how will those work on the Verizon iPhone? Example: Talking to someone and trying to give them directions on a web-enabled map
How many AT&T iPhone users will switch to the Verizon iPhone because, and I say this from personal experience, AT&T’s coverage sucks?
Verizon is already sold out of the iPhone. They sold more pre-orders than any phone previously released. While this will keep iPhone on top in terms of total units sold. Android is a juggernaut and will eventually outpace the iPhone in total units.
What does this mean for the iPhone Developer? Learn to develop for both platforms. I have previously stated my philosophy of cross platform mobile development (Develop on the iPhone first). I still stand by that as a best practises.