I haven't used it on the new one yet as I am waiting for the back to school promotion to start, but the audio did work on my 2012 MBA. So I'd assume it should still work on the 2013 model.I'm a little confused by the reviews there - does this cable carry audio on the latest MacBook Airs or not?
Apple TV is due for an update at any moment - not really worth the purchase at this point. I ditched mine around Christmas. I'm surprised it has taken this long!For a bit more, you could get an Apple TV and then stream content from the MBA over AirPlay.