Rick Wakeman's various musical extravaganza on ice were due to the venue already being used as an ice rink for six months of the year and the venue not wanting to defrost the rink *. The other six months it was a roller disco, which is how Starlight Express happened, but the forms of expression could easily be reversed. ELP went one better and put Palmer's kit and Emerson's B3 on skates, orbiting a static Lake on his rug. This required the development of wireless microphones, so indirectly we have Wakeman to thank.
* I'm a little concerned that this might actually be a fact, not disinformation
* I'm a little concerned that this might actually be a fact, not disinformation