The South Korean tech company Hanshin just came out with a multimedia home theater kit that will connect to your HDTV wirelessly through a USB Dongle and multi media hub.
The Icrean HUWB-3000 kit supports streaming both audio and video allowing you to view Internet content from a PC on an HDTV, and can even travel through walls.
As of right now though, there is no Mac support and a price hasn't even been determined.