Higher resolutions and refresh rates will be supported including up to 12K@120 and 16K@60. Additionally, more high-quality options will be supported including uncompressed full chroma formats such as 8K@60/4:4:4 and 4K@240/4:4:4 at 10-bit and 12-bit color.
"The HDMI Forum is proud to release the new HDMI 2.2 specification, providing higher performance and functionality for exciting and immersive new solutions and products," said Chandlee Harrell, President of the HDMI Forum. "The introduction of the new 'Ultra96' feature name will help consumers and end-users ensure that the maximum bandwidth of their products is supported."
"Ultra96" is a feature name that manufacturers are encouraged to use to indicate that their products comply with the HDMI 2.2 specification and support maximum bandwidths of 64Gbps, 80Gbps, or 96Gbps. Any product advertising or displaying the Ultra96 feature name must use an Ultra96 HDMI® Cable to ensure the product's maximum bandwidth is correctly supported.
The new Ultra96 HDMI Cable supports up to 96Gbps and all HDMI 2.2 applications, whereas current Ultra High Speed HDMI® Cables are suitable for maximum bandwidths up to 48Gbps. Similar to the Ultra High Speed HDMI Cable, the Ultra96 HDMI Cable is part of the HDMI Cable Certification Program, requiring every model length to be tested, certified, and display a certification label.
The new specification also includes the Latency Indication Protocol (LIP), designed to improve audio-video synchronization (lip-sync), particularly in multi-system configurations such as those featuring AV receivers or soundbars.
Source: https://www.hdmi.org/spec/hdmi2