Dude, totally with you here, but I haven't done either expansion yet!
I upgraded from an R9 280X to a GTX1070 - wanted to wait until this upgrade to start NG+ and then playthrough again and then do the expansions for the first time.
Yeah the visual fidelity at 2k is awesome, maxed out graphics and freesync on a 32 inch display is pretty mind blowing. Worth the wait, not sure when I'm going to do NG+, lot of other games to play after BW. Might be best to wait a while so I forget a lot about this game.