Rarely games even use over 2GB these days.
this is wrong, and depend on your resolution, it's a known fact now that gamers don't want 4gb gpu anymore
my old 970 can't do shit anymore with the 4gb
It's really personal. I know guys that are still perfectly happy with 4Gb cards, used 470 4gb will be sold around 100/120$ and I think that would be an awesome price for a cheap gaming pc that can run almost anything at full hd resolution
100/120 is a big loss already on the first retail wave, almost 50%, right now you can still sell a 1070 for 80% of its retail price
so for a comparison you have $200 loss on two 470 against $100 loss on a single 1070...and anyway it's true that many people are moving on higher resolution, 4gb ain't enough there