The HDMI cable adds a data channel to the HDMI connection, enabling high-speed, bi-directional communication. Connected devices that include this feature can send and receive data via 100 Mb/sec Ethernet, making them instantly ready for any IP-based application.
Audio Return Channel - The new specification adds an audio channel that will reduce the number of cables required to deliver audio ""upstream"" from a TV to an A/V receiver for processing and playback. In cases where a TV features an internal content source, such as a built-in tuner or DVD player, the Audio Return Channel allows the TV to send audio data upstream to the A/V receiver via the HDMI cable, eliminating the need for an extra cable.
3D Support - The version of the specification defines common 3D formats and resolutions for HDMI-enabled devices,