iPads come in 2 types, One is Verizon and one is AT&T, both have wi-fi capabilties but you will need to decide on a Verizon or an AT&T model.
It may not be important now but at some point it may. I bought an AT&T and switched to Verizon phone service and I cant get things like the Super Bowl for free, like you can on Verizon brand.