I'd like to be able to use Theatre View in a non full screen mode as well.
Currently I use Music Lobby to control music replay (in fact Music Lobby is what introduced me to MC in the first place - version 9), but it is set up to fill most of the screen but leave a strip on the right for Homeseer Touch amplifier control buttons. Although Music Lobby 3 generally still drives MC 14, it probably won't be long before it won't, and as Cinemar have gone a different way with their own back end system with Music Lobby 3.75 (without the amazing JR database) I doubt that any more development will be done with ML 3. That means that a different music selection interface is needed and Theatre view is better in most respects than ML 3, but it won't let me have easy access to the HSTouch interface; if it was resizeable it would.