[H] time to upgrade video card

[Winterlight]

It is time to update my EVGA 660 GTX video card. I play very few 
games maybe a couple a year, and by the time I get one it is usually 
an old one so I am by no means a gamer. However, I routinely do video 
editing and I want to be able to support 4K.  My PC is already 
equipped for 4K= I7 6/core, 64 GB of RAM, Samsung SSDs and I will be 
replacing my monitors with 4K supported monitors. But for now I want 
to start with the video card and I am far more interested in PC 2D 
performance then anything else.

I am debating between a EVGA GeForce GTX 1070 SC GAMING ACX 3.0, 8GB 
GDDR5, and a EVGA GeForce GTX 1060 6GB FTW+ GAMING ACX 3.0, 6GB GDDR5
... a 110 difference in cost and of course the 1070 consumes more 
power and produces more heat... hmmmm

So what does the collective and our gamers think. Is moving up to the 
1070 a wise decision or am I just wasting my money for performance I won't use.
Thanks

W