On the other hand look at the massive fps drops when changing resolutions on nvidia cards (looking at 980ti and fury x)
980ti goes from 125>84>41
Fury x goes from 90>61>33
Now if AMD comes up with drivers which brings fury x close to 980ti at 1080p, it will most likely jump in front on higher resolutions.
The percentage drop is roughly equal on both (~ 32%/32% & ~ 50%/46%).