Even though speakers are getting smaller and smaller, being able to install speakers flush against the wall or ceiling is always a great option. The problem with building speakers into your home is that it's hard to angle them for proper sound projection, while still keeping them level with the wall. QPD has a solution for the problem, with their line of motorized speakers that can be angled when in use and then tucked away when not.
Mounted flush in the ceiling, QPD's motorized speakers automatically drop down when you power on the amp or receiver they're connected to. You can then angle the speaker between 20 and 50 degrees using a wireless remote.