HDMI cables are used to carry the new HDMI (High-Definition Multimedia Interface) audio/video digital format that is now found on most consumer electronics that involve audio and video. HDMI cables provide the benefit of combining both digital audio and video into a single cable.
HTML Cable Versions
Versions of the HTML format do change over time. The two latest versions are v1.3b and v1.4. The latest v1.4 HDMI version has the benefit of supporting Ethernet connections, add data transfer to the mix. Though note, very little consumser equipment can utilise the the extra capabilities of v1.4. A v1.3b HDMI cable will serve the needs of most people for the forseeable future.