if they have issues supporting HDMI VRR then it wouldn't be this simple, at least not simple to communicate which type of screen is compatible.
even tho most TVs support Gsync/Freesync, it's not all of them. and many that claim "Gsync Support" actually rely on the fact that an Nvidia PC GPU will fall back to an HDMI VRR compatible mode. Sony TVs for example do that. Meanwhile other screens, mainly PC Monitors, will use the freesync premium compatibility that Geforce cards support as a way to be compatible with Gsync.
them using a display port to HDMI converter before outputting to a TV complicates things.
I hope they will patch VRR in as quickly as possible, but they only will do it I bet if they can get it to work on any HDMI VRR TV.
I'd love for them to just offer a setting with a warning that it's "experimental" or something, so that people who have decent TVs can use it. LG and Samsung TVs should have no issues for example as they support Freesync Premium, and with that should definitely be Gsync compatible even if they can't fall back to HDMI VRR.