Not the 480 killer everyone boasted it would be, not to mention no SLI. With that price, you really have to be a green team only, and even then, why not save up for the 1070? Not sure where this fits in.
Only if you WANT multi-GPU - for a lot of us, multi-GPU is worthless. In my own case, multi-GPU is worthless because my motherboard doesn't support it. (For others, the reason for multi-GPU being useless are likely different - insufficient PSU could well be one of them, though that isn't the case for me - given motherboard support, I could go dual-RX480 or even dual-GTX 1070.)
Another reason GTX 1060 (of all sorts) comes out ahead is that, at WORST, I will be reinstalling the current driver (which is the latest Game-Ready driver); if the GTX 1060 has a newer launch driver, I download and install that. In either case, it's a "quibble" upgrade.
Power requirements - single 8-pin (either AIB or FE). Still quibble turf (current GPU is a single 6-pin).
The other problem - right now, neither GTX 1060 or AMD RX480 qualifies in any way as really *available in volume* - even from the AIBs.