This is not a gaming monitor.
The first rule of Wide Gamut displays is:
1.) If you do not know what the purpose of a wide gamut display is you should not be buying one.
The PA279Q is meant to be used for for work (photo editing, graphic design, print) in color managed programs such as Adobe Photoshop & Lightroom which can properly display the Adobe RGB Color Space. Games are not color managed which makes wide gamut monitors pointless since they will make the colors look over-saturated and inaccurate. All consumer media is designed for the sRGB color space.
Cheap wide gamut displays (sub 1000$) sRGB modes can never match a true sRGB display and typically have locked color settings. Only high end NEC/Eizo models have proper sRGB color space emulation.
The PA279Q lacks Asus's overdrive control (Trace Free) which is scary since the Dell U2713H (same panel) also does and has obvious ghosting issues. The Asus will likely also have very high input lag like the other GB-LED back-lit models (Dell U2713H & LG 27EA83D).
PC Monitors Annoucement Article
Guru 3D Announcement Article
+Height Adjustable, Swivel-able, Portrait Capable Stand
+100% sRGB Color Space Coverage
+99% Adobe RGB Color Space Coverage
+103% NTSC coverage (by CIE 1931 test standards)
+LG's new Semi-Glossy Coating (hopefully it will not have cross-hatching issues)
+6-Axis Color Control
+Plenty of Inputs
Basically this is just Asus's version of the U2713H.