It seems that NVIDIA definitely is loosing up on the topic, this round offering support for HDMI-VRR and adaptive sync over HDMI and/or display port. Existing screens do not get the function - future models will.

NVIDIA confirmed that future G-sync module screens can be capable of supporting both HDMI-VRR and adaptive-sync for HDMI and DisplayPort. A firmware update is being made to the v1 and v2 G-sync hardware modules for future use which allows these new features.

This means that in the future a display featuring an NVIDIA G-sync module would work with compatible games consoles for HDMI-VRR. It could also work with any graphics card based on the adaptive-sync standard over HDMI and DisplayPort. This means that you would be able to use a Native G-sync screen (with module) from an AMD graphics card for VRR. So if you have an AMD graphics card, you could still enjoy the VRR experience and other additional benefits that the G-sync module brings even from a Native G-sync screen, which was previously out of reach to those users. 

The first two models with the new firmware are the Acer Predator X27P and the XB273 X.

Nvidia G-Sync monitors get Adaptive Sync enabled for AMD video card support