I think a good use is to connect a Miracast device to hdmi so you can stream from a smartphone or pc things like movies or stereoscopic photos. I will put on software section Apps and programs for pc and smartphone to use 3D (with or without Edison)
A note: do NOT buy Chromecast because it only works on certain Apps and only with Android. If you buy a Miracast you can even see the desktop and any Android app or game on tv. And it works with pc. Any Windows 10 pc can stream wirelessly to your tv if you have Miracast receiver. That's not possible with chromecast. Some Miracast receivers are even iPhone/iPad compatible.