Can you open webpages and document on an apple tv ?
We're sharing our desktop with the
AirPArrot to the AppleTV which in turn shows it on the boardroom screen.
There are quite a few disadvantages about this approach, such as the AirParrot application not being free for Windows and that your clients have to be on the same subnet as the AppleTV to be able to discover it.
I still prefer the VGA/HDMI cable route, because it just works all the time.
For our support/monitoring room, we're using thin clients (Windows CE I think), which simply reloads certain webpages every 60 seconds using Google Chrome.