At its most basic level, Miracast is a video streaming specification created by the Wi-Fi Alliance. It allows a user to share whatever is displayed on their device's screen with another compatible product. Whether that's a TV, another smartphone, a tablet, or a desktop. The spec supports up to 1080p HD video and 5.1 surround sound. The dream is, you could download a movie to your tablet via the Play Store (or your preferred medium) and stream it to your TV without ever plugging in a cable and without sacrificing quality. Among other applications. The neat thing about Miracast is it doesn't require any special hardware to work. So unlike, say, a new wireless standarad (eg, 802.11n, 802.11ac), you won't need to upgrade to a new device in order to use it. In theory anyway. More specifically, Miracast is built on top of WiFi Direct, which allows devices to utilize WiFi to communicate with each other directly, instead of having to hop on a mutual wireless router. There's already a push to make more mobile devices support this standard, since it makes things like file transfers much easier, so Miracast support is already piggybacking on another train's momentum. This will be good for support.