Showing more results from a domain

Today we’ve launched a change to our ranking algorithm that will make it much easier for users to find a large number of results from a single site. For queries that indicate a strong user interest in a particular domain, like [exhibitions at amnh], we’ll now show more results from the relevant site:
This update seems very interesting to say the least. The first question that popped up was which combination of keyword and site are going to have similar results?

It looks like some major sites are going to benefit hugely from this change while others are going down in results. The question is which sites are going to be positively affected. Is the change limited to 'branded' sites only or is there another (quality) factor at play?

Personally, I rather have different sites to choose from in search results and I wouldn't like to scroll down skipping similar results and have to continue down to the second page. It looks like site navigation which rather should be done once on the site itself.