The HDMI 2.1 standard was officially announced earlier this year at the Consumer Electronics Show (CES 2017). Today, the HDMI Forum has announced that it has officially released the specifications that will eventually be incorporated into next generation televisions and computing devices.
Critically, the HDMI 2.1 spec is tasked with supporting

Source: Hot Hardware – HDMI 2.1 Spec Officially Released With Support For 10K Video Resolution