Even in 1.0 teleports didn't get you everywhere, so there would still be a need for mounts.. as to the ferries and airships.. honestly only used the airship running low on anima.. Ferry I think I used all of once to go from Limsa to Ul'dah since I started @ Limsa.

It'll be up to individual people whether they choose to port everywhere or to take the time and run once and a while.. imagine people that are gathering and fishing will get to see the world even if the port everywhere crowd doesn't.