Some answers to peoples questions:
1. This monitor (nor the flat one) does not support Free/G Sync.
2. The new LG 34" coming out, the -67, does support Free Sync BUT it is NOT 3440 x 1440. I repeat, it is 2560 x 1080. Some early leak sites got the specs wrong and assumed the 34um67 would be 3440 x 1440 like the um95 and c97, but its sadly not:
3. I am exclusively a gamer and 'general' windows 8.1 user, and I loved the flat screen 34um95-9 as well as my 34uc97. I use high end hardware (2 x GTX 980s in SLI and obviously use the DP cable, not HDMI, to get 60hz). Games look amazing. I also owned the 144 hz Asus PG278Q with the same video card setup. Yes, the Asus at 144hz and g-sync on was AMAZING when it came to speed and the liquid like fluidity of motion. But the picture, colors, and size of the LG's won out (for me) and I sold the Asus on ebay.
4. Yes, it was lame that the curved LG did not come with the USB 3.0 Type B cable whereas the flat screen model DID come with this cable.