HDMI ethernet channel - Adds high-speed networking to an HDMI link, allowing users to take full advantage of their IP-enabled devices without a separate Ethernet cable
Audio return channel - Allows an HDMI-connected TV with a built-in tuner to send audio data "upstream" to surround audio system, eliminating the need for a separate audio cable
3D over HDMI - defines input/output protocols for major 3D video formats, paving the way for true 3D home theater applications
4kx2k resolution support - Enables video resolutions far beyond 1080p, supporting next generation displays that will rival the Digital Camera systems used in many commercial movie theatres.
Expand support for color spaces - Adds support for additional color models used in digital photography and computer graphics