Android has had it for quite some time also if you have a smart tv with dlna support(most of the newer ones). What's new is the support in chromecast. Does the ios solution work with any smart tv or do you need an airplay?
Android has had Miracast support (with display mirroring) for a while now...just nobody used it. Chromecast is/has the potential to be a much more widely used and supported protocol.