New Nvidia G-sync modules are now going to support Adaptive-Sync/FreeSync
www.tftcentral.co.uk
From the article:
However, the only downside is that you can't update old G-sync modules:
I'm not sure where Nvidia is going with this, although it might give companies incentive to release G-sync module "only" versions of monitors (and thus, make money from both AMD and Nvidia card owners). As Nvidia already has Adaptive-sync support with the G-sync compatible branding, I assume that it's too late for G-sync modules anyway. However, it's nice to see the open standard winning.

NVIDIA Open Up Support for Adaptive-sync/FreeSync for Future Native G-sync Module Screens - TFTCentral
Share this contentIn the last year we’ve seen a distinct change to NVIDIA’s approach to variable refresh rates (VRR) and their ‘G-sync’ technology. Historically there was a clear demarcation between....[click link for more]

From the article:
NVIDIA confirmed for us that future G-sync module screens can be capable of supporting both HDMI-VRR and adaptive-sync for HDMI and DisplayPort, as the XB273 X’s specs had suggested. A firmware update is being made to the v1 and v2 G-sync hardware modules for future use which allows these new features.
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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.
However, the only downside is that you can't update old G-sync modules:
We confirmed with NVIDIA that it will NOT be possible to update firmware to any existing Native G-sync screen, or request updates to allow your current G-sync screen to be updated so that it would work with AMD graphics cards. The new firmware will only be applied to future G-sync module displays.
I'm not sure where Nvidia is going with this, although it might give companies incentive to release G-sync module "only" versions of monitors (and thus, make money from both AMD and Nvidia card owners). As Nvidia already has Adaptive-sync support with the G-sync compatible branding, I assume that it's too late for G-sync modules anyway. However, it's nice to see the open standard winning.