This is useful for educational purposes, too - wirelessly streaming from a chrome browser or chromebook to a projector (via hdmi to vga adapter).
(An alternative if you have a laptop connected to the projector is to run AirServer to act as a virtual Apple TV, and then either airplay from your ipad or run AirParrot from a windows tablet. Of course Chromecast will be the first solution to work from android tablets, too, since Miracast solutions still seem to be non-existent or not so great.)
I'm actually desperately searching for confirmation on whether this devices DOES support Miracast (and screen sharing). My guy is saying "no", since it isn't advertised anywhere. I think this device might only be receiving URIs and control commands from other devices.
(An alternative if you have a laptop connected to the projector is to run AirServer to act as a virtual Apple TV, and then either airplay from your ipad or run AirParrot from a windows tablet. Of course Chromecast will be the first solution to work from android tablets, too, since Miracast solutions still seem to be non-existent or not so great.)