I got my 144hz screen today. Set it up and one of the first things I noticed on my 1080ti is that this screen is NOT just limited to AMD's Freesync, but it also works 100% with G-sync as well. That can be enabled in the NVIDIA control panel as long as you have a 10 series GPU and for Freesync AMD of course.
My first game I tested it with was Overwatch. And wow what a difference 144hz compared to 60hz is night and day difference. The input lag is clearly less and the response time is incredible. 1080P gaming is far from dead and this has been a real game changer for me so far. There is zero noticeable motion blur with G-Sync on, ZERO screen tearing.
I'd give this 8 stars if I could. Another thing is this screen is very easy on the eyes with multiple settings to adjust to find the perfect picture to suit your needs. Including a blue light level filter.