Desks on wheels is an interesting idea.

I used to work at very "free flowing" organization. The furniture was simple standard cube farm fare.

We didn't have desks on wheels but we did periodically have "floor moves" to bring teams physically together. I recall one of my colleagues going on holiday. Whilst she was away a floor move was conceived, planned and executed. She came back to find she didn't even work on the same floor any more. Someone had packed and moved her area; but she had to find and unpack it herself.