By rkunreal93 - 07 Jan 2020, 02:02
HDMI 2.1 cannot be added via a firmware update. This applies only to optional HDMI 2.1 feature such as ALLM and eARC that can be enabled on HDMI 2.0 chipsets. HDMI 2.1 is a completely new signaling technology so HDMI 2.1 ports requires new hardware.
HDMI 2.1 ports will be embedded in Sony's 2020 Z8H (ZH8) and X900H (XH90).