AMDs Freesync is basically a "code name" for something that has become a VESA standard, which is "Adaptive Sync".
And Intel decided to support Adaptive Sync, which is again, a standard now.
And yes, Nvidias Gsync will become obsolete in the long run. Right now Gsync has a main advantage over Adaptive Sync- it has a better working variable overdrive, which has less ghosting/corona effects during variable refresh rate mode.
With the OLED monitors, you need no overdrive anymore, which means Adaptive Sync will be just as good as Gsync.
In the long run NVidia will have to give up on its "exclusive" thing and will add support for Adaptive Sync, theres really no way around it. Especially once Adaptive Sync becomes a HDMI standard as well.
Other than that- Ive received the 2730Z and I gotta say its a beast of a monitor. In absolutely rare scenarios, its possible to see the vertical lines (pixel inversion), but its really extremely rare and you have to be really close to the display to actually notice it. The Asus 278 ROG had some other form of Pixel Inversion and was way more prominent than on the Benq.
Also the Smart Scaling thing really works great, to my surprise. The scaling is really solid, I dont think I had a better scaling monitor than this one.
What I do is- I scale the 1080p console output to 23" size on the monitor (with black bars around the image), because in fps games on consoles you have a very low FOV of usually 60 degrees. So when you play games like cod/battlefield etc. on consoles, the smart scaling feature comes in very handy and you can adjust the image to the size where you no longer feel like playing with a magnifying glass in front of your face.
Even scaling the 1080p image to the full 27" screen on the benq looks pretty solid. The scaling definitely looks better than on the PG279Q that Ive also tested with the ps4.
Im really happy with it, even though I cant use Adaptive Sync, because I have a NV card, but it doesnt bother me because the games I play most of the time online can do 140+ fps. I wish this benq had Gsync though.
Now yes the vertical+horizontal TN color shift is not that nice, but its something I can get used to, unlike the stupid glow and abysmal BLB on the AUO ahva panels.
Also I gotta point out that the contrast and colors are way better than on other TN monitors, by far!
Only other thing I wish was different is the AG coating. It does seem rather aggressive, I notice a little shimmering around black letters for example on white background. But its again not as bad as some other monitors I had. So its still acceptable to me.
Benq needs to release a TN gsync with a better coating and same capabilities as 2730 and it would be the best "pre-oled" monitor overall. Id get the gsync version and sell the 2730 then.