I have a fancy-azz little cheap-o box that connects to my wifi and will stream HD to my television from various sources. I feel like I'm slightly beating the cable company when I use it.
Tonight I used it to watch all of season one of the sci-fi web series Pioneer One. It's actually pretty darn good. It was funded totally through donations, is Creative Commons, is legally downloadable on BitTorrent, and can be streamed online.
Plot spoiler: The Russian "Martian" in the series is HOT! Aleksandr Evtushenko as "Yuri."
Here's the series ready to stream on the TV. Once it starts, you just maximize the video and you'd never know it was YouTube.