Wireless HDMI technology allows users to transmit high-definition video and audio from one device to another without cables. There are two main methods: using wireless HDMI transmitters that plug into devices, or using apps where a transmitter plugs into the TV and the app streams from other devices. While convenient, wireless HDMI using apps relies on WiFi which can be unstable. For wireless HDMI to succeed in replacing cables, it needs to be cross-platform, compact, and user-friendly.