Frank - while I applaud the technology and concept, I think you are over thinking this to a huge degree. Let's say I want the usual sounds, would that be so much simpler to stick three 57s (or insert your favourite) at each position centre, edge or between maybe, and then sit with three faders and have endless possibilities, rather than motors, movement and video cameras - and the even be able to automate mic swaps inside the box for different sections?
I love the idea though.
Anecdote time.
Years back I was on a soundcraft course and one of the guys was Metallica's Big Mick Hughes - he told a great story of their guitar rig being in a foam lined flightcase, in the dock, backstage. He was getting a sort of clicky thump in time with the music. Traced to a member of the LX crew sitting on the case, totally unaware his boots on the wood were a new sub bass element!