The High-Definition Multimedia Interface [wikipedia.org] 2.1 specification has been released. The total transmission bandwidth has been increased to 48 Gb/s from the 18 Gb/s of HDMI 2.0.
Using Display Stream Compression (DSC), HDMI 2.1 cables can transmit 4K @ 240 Hz, and 8K (7680×4320) and UW10K [wikipedia.org] (10240×4320) @ 120 Hz. The specification also adds new features [engadget.com] such as Variable Refresh Rate, Quick Frame Transport, Quick Media Switching, and Auto Low-Latency Mode:
This new version of the HDMI specification also introduces an enhanced refresh rate that gamers will appreciate. VRR, or Variable Refresh Rate, reduces, or in some cases eliminates, lag for smoother gameplay, while Quick Frame Transport (QFT) reduces latency. Quick Media Switching, or QMS, reduces the amount of blank-screen wait time while switching media. HDMI 2.1 also includes Auto Low Latency Mode (ALLM), which automatically sets the ideal latency for the smoothest viewing experience.
Also at The Verge [theverge.com].
Previously: HDMI 2.1 Announced [soylentnews.org]