We recently had a hack days project at work. One of the themes was using a samsung Smart TV. Our idea involved doing a home automation application. We used an Arduino with an Ethernet shield and relay, and hooked that up to a lamp. The web server on the Arduino would then listen for Get Requests passing a boolean value.
We developed the Smart TV app, and an Android based application dashboard to control the devices attached. This was a small proof of concept app, just to see what we would do.
Video of our demo can be seen here: