Airplay Mirroring on Mountain Lion

I have an apple TV that does not have Hulu plus or HBO go. I have a macbook air. I am looking forward to the Airplay Mirroring feature that will allow anything on my computer to be mirrored to my TV (via apple TV).

I have noticed that many shows on hulu plus have been marked 'web only'. I can use the mountain lion/apple TV mirroring to watch these shows on my TV.

My question is this airplay mirroring going to work for me or will studios find new inventive ways to block this from happening?