Video Via Powerline

AverLogic Technologies Ltd showed a device capable of transmitting MPEG-4 video and audio via power lines. While current trend is to go wireless, power lines do not present limitations on distance and interference as much as wireless does. And, of course power lines are just simply there so no install per say. However currently there is one limitation - transmission rate is up to 200 MBps which is not enough for uncompressed HDTV.

Source: EETAsia.com