When I’m walking around IRL, I often think how great it would be if you could skitch, jump on a horse, a bike, a motorbike, a moped, a scooter, a skateboard, rollerblades, ice skates, a passing dragon, a helicopter, a power boat, a kayak, on top of a car, the back of a moving bus / train, climb up a building, jump between buildings, hang-glide or parachute off a building, take a lift instantly to the top of a building, sprint infinitely, run on water, teleport anywhere in the world, or otherwise sprout wings and fly. All of these things are available to you in one video game or another. But no video game contains them all.
OK, so it would be odd to have rollerskates in the same game as dragons, and some of these transport options do overlap – you don’t need to be able to skitch and jump on the back of a bus. All you need basically is:
1) A way to travel long distances more or less instantly
2) A way to travel short distances quite quickly
3) A way to travel a scenic route at a decent pace
4) An autopilot travel option that follows the logic and satisfies the impatience of a human player
5) A way to spontaneously generate or easily access all of these options.