Trying to find someone to design a "swivel wall" for space between LR & Library within existing built-in bookshelves... conceptually similar to this. However, should mount TV from ceiling on panel for one side & bookshelves on backside. Would look like built-in bookshelves when not viewing TV. Need to secure items on bookshelf side to accommodate movement. Hmmm, must ponder more options.
dieCollection's Media Stand Keeps Your TV Upright and Doing the Twist