I just got a Roku box to plug into the TV as I investigate alternatives to the cable/satellite TV hamster wheel. There are other similar devices from Google, Samsung, etc., and some TVs with built-in WiFi, that all hook into your home network and offer a variety of options for getting video to the TV.
So far, I'm only playing around with the free channels while I get the feel for how all this is working. Netflix is one of the main options for a wider variety of programming, and something I'll probably get at some point. There's also a
couple of
free apps that you can install on the computer to use it as a video/music server to the TV for any files you have on the HD, and I'm having fun with those. The cool thing is that they will convert most formats on the fly to stream to these boxes (or even the XBox 360 or Playstation 3 if you want to try them out before getting the WiFi box itself).
None of these are a complete solution yet, but they seem to be gaining momentum fast enough where I could see a fairly quick transition away from the standard television cable/satellite/broadcasting model in the semi-near future.
I'm curious if other people have played with these boxes, and if you have any advice or experiences to share.