I would like to see a monitor just like this one but with gsync come out soon. I don't think I will get that lucky but if LG made a version of this monitor with it I would definitely buy it.
ATTENTION neither the LG 34UM67 is not 3440x1440 nor there is currently a 3440x1440 with FreeSync
After some research:
LG 34UM67 21:9 2560x1080 34" FreeSync AH-IPS (in europe 768 USD)
LG 34UM95 21:9 3440x1440 34" NON FreeSync AH-IPS (in europe 750 USD)
LG 34UC97 curved 21:9 3440x1440 34" NON FreeSync AH-IPS (in europe 1017 USD)
There is also LG 29UM67 21:9 2560x1080 29" FreeSync AH-IPS (in europe 377 USD)