air video works however you will need to keep a computer on while watching the movie
Which basically means you use your main PC too much, or you should build a cheap server, which is less efficient than building a HTPC and offsiding it as a server on top for the rest of the house.
I like the first plan. It is a solution that is self contained.
The second solution basically suggests that you make the apple tv redundant.
Although i hope there's a second generation of these
. I've got one but it doesn't like my TV. Sounds like a teething issue considering it works on all the other LG tv's i've tried it on.
I coupled that with a $10 bluetooth micro wireless usb keyboard/mouse combo. (which is the size of a remote)
Testing was good except for the whole it worked everywhere but my own TV. =_=.