Xbox, Xbox 360, Xbox 1
Windows 7, Windows 8, Windows 10.
I'm a little surprised they aren't calling it Windows One.
I used the GSYNC upgrade kit on my VG248QE in January and since experiencing GSYNC I could never go back. Everything is much smoother at all frame rates without stuttering or tearing or any of the added input latency standard VSYNC adds.
I can't wait for non-nvidia support, but it is a long ways out.
Your failure isn't stopping it from becoming the norm.