HDMI Ethernet Channel - HDMI Ethernet channel technology consolidates video, audio, and data streams into a single HDMI cable, combining the unattached signal quality & the convenience of HDMI connectivity with the power & flexibility of home entertainment & networking.
Audio Return Channel - Allows an HDMI connected TV with a built in tuner to send audio data "upstream" to a surround audio system, eliminating the need for a separate audio cable.
Supports 3D Technology - Defines input / output protocols for major 3D video formats, paving the way for true 3D gaming and 3D home theatre applications.
4K Resolution Support - 4K is shorthand for 4,000 lines wide by 2,000 line high. or roughly four times the resolution of a 1080p display.