According to Wikipedia. vesa is working on an improvement of their diaplayport 1.4 so it can handle 40 Gbit/s bandwidth that can come as early as Q1 2018 . (https://en.wikipedia.org/wiki/DisplayPort#1.4) so what do i want with this bandwidth .
34 inch , 21:9 , 5120 X 2160 , 120 hz , 8 bit (10 bit with FRC) , HDR . (comes at 39.81 Gbit/s )
This comes just below the bandwidth. check this calculator: https://k.kramerav.com/support/bwcalculator.asp.
This give you ultrawide at the 4k resolution level of PPI and the 120 hz refresh rate . all these specs at the point of severe diminishing returns so it is perfect to get most bang out of the bandwidth.
Make sure to use the tool above and tell me how you want the bandwidth to be utilized.