I’ve been using Target Display Mode often over the past couple of months, using my iMac screen as a display for my MacBook. This solved the problem of shuttling video and other files between the two devices – now I do almost everything on my MacBook, while I still have the iMac there when I need it. Since Target Display Mode doesn’t let you share a keyboard and mouse/trackpad, and since you can’t control your iMac to turn off Blutooth once you initiate Target Display Mode, I went off in a search of a solution.
If it were up to my wife, we would have a house without wires. Fortunately for her, technology seem to be heading in that direction. At home, we do have a wired speaker system, but probably get just as much use out of a Logitech Mobile Boombox in our master bathroom.