I've been happy with the value of my GTX1070. The G-Sync ASIC/FPGA board costs for a compatible VRR monitor? Extremely beyond my value/price range.
This is the right move for nVidia customers & hopefully we'll see HDMI 2.1 VRR in the future (maybe when they release 2.1 cards) on top of DisplayPort next week. https://www.anandtech.com/show/13797/nvidia-to-support-vesa-adaptive-sync-with-gsync-compatible-branding