user wrotehttps://www.youtube.com/watch?v=1ix5kWsrvf4&ab_channel=NCIXTechTips
Apparently Polaris is not meant for gaming at all. And I heard that a single gtx 1080 will be as powerdul as 2 gtx980 in sli, and gtx980 is already a powerful card... So yeah it will be immensely more powerful than Polaris. Also I hear nvidia has something called v-sync that is also meant to combat screen tearing.
Holy balls! Dude, mainstream does not mean 'not meant for gaming', it means sub-$300 pricepoint, it doesn't have to do with performance it has to do with the price bracket the product is in, the 380X is mainstream, does that mean it's not meant for gaming? Hell no! Plus, AMD said Polaris will bring VR-capable cards to the mainstream segment, so the minimum expectation is that it'll match the 390X at a lower price.
In terms of Pascal being more powerful than Polaris, it is, not immensely, but it will be more powerful, but Polaris is not meant to be a competitor for the 1070 and 1080, it's meant to offer VR-capable cards for a mainstream price and be a competitor for the GTX 1050/Ti and 1060/Ti, AMD plan to win the majority of the market (80% of people that buy dGPUs buy sub-$300 GPUs).
It will be as powerful as 2 GTX 980s in VR applications, and need I tell you SLI's scalability only gives you 60% better performance? So a 1080 will at best give you 30% better performance than the 980 Ti.