Well I like Autopia. But it could use a cool upgrade. I really think they should do something along a star speeder series from Star Wars. Imagine stepping into a car that has no wheels, running on a magnetic track as you fly through tommorrow land under the monorail, over the water and off road. as you take the controls, the car would bank left or right and possibly have an acceleration area just give it a small thrill.
That's my two cents.