Can get a Vega 64 now for 380... I don't see myself going 4k for a long time, to be honest - I'm happy with higher framerates at 1080p+1440p. Currently I have a GTX970 and it's still pretty great at 1080p. But it is starting to show its age, especially on the RAM front.
My dilemma is basically whether to sit on the 970 for another year or two or get a card that's rather overpowered for my needs right now but will allow me to peg games in my resolution range over that same period I'd otherwise wait to upgrade