AMD has long pursued a strategy os using smaller and more efficient chips to combat their biggest rival Nvidia. Prior to GCN, AMD tended to have smaller flagships that sipped less power and had lesser compute abilities. This all changed around with GCN where AMD focused on compute more while Nvidia did the opposite. This lead to Nvidia topping the efficiency charts and combined with their marketing soared in sales. If the rumours are true, Polaris 10 will be smaller than GP104, its main competitor.
With Polaris, AMD should be able to regain the efficiency advantage with both the move to 14nm and the new architecture. We may see Polaris based Macs as soon as WWDC in June, just after the cards launch at Computex. In addition to a ‘superior’ product, AMD is also willing to cut their margins a bit more in order to get a sale as we saw with the current-gen consoles. Perhaps, is AMD plays their cards well, we may see Zen Macs as well.