The new Google Plus changes does create some issues - specially the authorship ranking.
While this comes as an advantage to some of the early adopters - soon this will be a feature in most blogging softwares.
The next step for Google would probably be the integration of "add to circle" right inside the serps. When that happens they will probably have better customisation of the search results as more of your preferred people/sites start showing up in your search results (which is already happening to some degree).
That's great - but they should probably make sure that they have rich snippet tags for other kinds of businesses too. Like for example Q&A sites, communities like webmasterworld,quora - what I mean is you cannot leave out anything just because it doesn't clearly support a clear line into the social serps of Google Plus.
If rich snippets are to be used then they should start using the favicon or any other new kind of meta data for an image display for the other types of organisational results in the serps to level the playing field.