The new HDMI 2.1 specification (and cable) adds support for 10K, 8K HDR, and 4K at 120fps: Digital Photography Review
AMD reaffirms HDR abilities, HDMI 2.0 is the limitation
Will a video card with an HDMI 2.0 output work with a 1080p TV/monitor with only an HDMI 1.4 input? - Quora
How to get 4K @60 fps via HDMI 2.0 on a TV - Quora
Belkin HDMI To DisplayPort Adapter - Display Port 1.2 to HDMI 2.0 Converter - Compatible With 4K 60fps, HDR And HDR 10 Monitors, Projectors & HDTVs - Uni-Directional Display Port To HDMI Adapter Cable
Does HDMI 2.0 Support 1080p 120Hz? Addressing HDMI Questions | GamersNexus - Gaming PC Builds & Hardware Benchmarks
Silverback Durable HDMI 2.0 Cables, 4K 60Hz with a Braided Nylon Jacke — Sewell Direct