What are the wireless display options for MacBook Air?

While not available until this summer, the next version of the Mac OS (Mountain Lion) will allow you use AirPlay on some Macs to send your display to an AppleTV.

From the site:

Your Mac is on TV. This new feature in Mountain Lion is made for an audience. With AirPlay Mirroring, you can stream what’s on your Mac to your HDTV via Apple TV. Show web pages and videos to friends on the couch. Share lessons with a classroom. Present to a conference room. It’s a big deal for your Mac. And for everyone around it.

You could use a Nyrius Wireless AV Sender. If you're looking for a small, slick unit to get your presentations displayed while visiting clients it probably isn't for you. If you want to get content from your Macbook Air onto your wall-mounted display at home without stringing a long HDMI cable across the room it might be just what you want.

An alternative - look at this youtube video showing how to do it with an intermediate iPad, maybe not so practical. It uses an app called iDisplay for $4.99. In that it seems to be doing the same kind of function as Air Display which I use and would recommend over anything else.

Second alternative - AirFlick from Erica Sadun - allows you to make your Mac an AirPlay source so you can mirror its display to an AppleTV, just as if it was an iPad. This won't be as easy as we might expect of Mac software, Erica is an awesome hacker but doesn't employ a team of graphic and web designers to make beautiful lick able software.

MECast dongle will do the job and only costs around $35 online! It is much better than Chromecast for the price.

It supports mirroring Windows PC Laptops as well as MacBook in addition to Android phone and tablet in Miracast functions including Audio. It is also compatible with iPhone/iPad too! It supports DLNA and Airplay as well.