Kohler’s DTV shower was introduced last year, but the latest version is fully loaded. It features a control system for the shower with functions like water pressure and temperature, but also chromatherapy (from above), steam, and a built in stereo system, all controlled from a LCD screen that can be mounted on the wall.
http://www.us.kohler.com/index.jsp

I imagine within the next several years this will be a standard feature in many master bathrooms.