HDMI Ethernet Channel
The HDMI 1.4 specification adds a data channel to the HDMI cable and enables high-speed bi-directional communication. Connected devices that include this feature will be able to send and receive data via 100 Mbps Ethernet, making them instantly ready for any IP-based application.
The HDMI Ethernet Channel allows an Internet-enabled HDMI device to share its Internet connection with other HDMI devices without the need for a separate Ethernet cable. The new feature also provides the connection platform to allow HDMI-enabled devices to share content between devices.

Audio Return Channel
The new specification adds an Audio Return Channel that reduces the number of cables required to deliver audio upstream for processing and playback. In cases where HDTVs are directly receiving audio and video content, this
new Audio Return Channel allows the HDTV to send the audio stream to the A/V receiver over the HDMI cable,
eliminating the need for an extra cable.

3D Over HDMI
The 1.4 version of the specification defines common 3D formats and resolutions for HDMI-enabled
devices. The specification standardizes the input/output portion of the home 3D system and
specifies up to dual-stream 1080p resolution.

4K x 2K Resolution Support
The new specification enables HDMI devices to support high-definition (HD) resolutions
four times beyond the resolution of 1080p. Support for 4K x 2K allows the HDMI
interface to transmit content at the same resolution as many digital theatres.
Formats supported include: 3840×2160 24Hz/25Hz/30Hz
4096×2160 24Hz

Expanded Support For Colour Spaces
HDMI technology now supports colour spaces designed specifically for digital still cameras. By supporting sYCC601, Adobe RGB and AdobeYCC601, HDMI-enabled display devices are capable of reproducing more accurate life-like colours when connected to a digital still camera.