I haven't tried it yet, but if you have both an iPad and an AppleTV, you can stream certain types of videos directly from your iPad to your TV using a feature called AirPlay. I've seen the icon for doing this appear on certain tube sites when watching an HTML5 video. If I could stream HD-quality video straight to my flat-screen (actually a 100" projection screen), I would pay for that.
I got the original AppleTV years ago which I really like and still use. It had an integrated hard drive big enough to download and store a bunch of movies and TV shows and keep them to watch later (or take with you since it was small and portable) and was full 1080 res and could still use airplay to stream from your laptop or desktop PC.
I received the new one as a gift and I don't like it as much: it is smaller, has no hard drive, and is only 720 res. I don't get why they dropped the resolution and lost the capacity to store movies. I don't have a 100" TV, but I have a 74" and the drop in resolution is noticeable.