Oh dear... I mean, to be fair, it was a very strong win, if slightly exaggerated due to Hamilton being right in traffic and Rosberg being nowhere, but where I do see Ferrari being very strong is that Mercedes will keep their drivers level, given both the opportunity to win or hold each other up whereas Ferrari can (and will) put their focus entirely to Vettel, as Kimi just hasn't proven to be up there, either by bad luck, lack of motivation, or simply uncomfortable or other reasons. With the point gap that is already present, they can focus on Vettel. That can be dangerous depending on what the gaps are.
Hungary was an eye opener: Rosberg was simply lost until Hamilton was right on his tail and the gap to the Ferrari gave him some belief that he could win the GP which immediately translated into stronger pace (maybe the mediums helped too). It's going to be interesting indeed. If Rosberg and Hamilton go at it full blast, they might cause quite a headache if Ferrari can close that gap a little bit more. I'm still amazed at their start / launch of the line. Qualifying - well, they're still quite a way off.