I must admit that I'm very impressed with this software. AirServer may be great for AirPlaying my iOS source to my Mac, but I needed something to AirPlay a video from a web browser to my Apple TV. Air Parrot does it, and does it well!
I don't have to, (but can) Mirror the Mac or PC to the AppleTV, but even better is that I can AirPlay a specific app (such as Safari) so that I can watch an episode on regular Hulu, or a major network site such as ABC.
Why would I do this? Simple, if it isn't on Hulu Plus, NetFlix, or Amazon, and it is on Hulu or a netwok site, I can watch it on my TV!
Yes, I tried watching it on the Boxee browser from a Boxee box, but it has some massive Flash limitations. Air Parrot works with it all!