This is good news as I'm probably going to have to upgrade to a MacBook Pro with integrated graphics since Apple refuses to upgrade the Air to a Retina display.
oh. Isn't 2K 1920x1080? Since 4K is double that at 3840x2160p? Anyway, if that's the case then I say wait to make your decision and look at the benchmarks of the latest cards of the titles you want to play.
Wasn't the 970 already quite good at 1080p gaming? If the performance rumors are true, the 1070 will be more than capable for 1080p and the 1070 will serve more value than its flagship priced counter part.
I say go 1070 and g sync monitor.
Bernie's policies wouldn't work in the US. Heck, they wouldn't work anywhere. Take a look at failing economies of Europe. Europe is only standing due to the US economy and even the US economy is quite poor.