They were going to do something similar with Tomorrowland at DLR (inspired by the future that never was) but cheaped out majorly and ended up making it worse.
I know trackless rides are overdone now, but I think a trackless WALL-E ride could be incredible. Creeping up on things only to zip away, startled. Spinning through space with a fire extinguisher. Maybe even elevators to blast off and crash back down to earth.