Hi Katie -
You are one of several people I've seen raise this very question about analytics. The answer is - we don't know yet how this will affect data. It's a really good question! Stay tuned and I am sure there will be an avalanche of posts about this all over the web over the next couple of months.
Right now, what seems clear to me is:
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having a really good photo is critical in the carousel; some businesses are coming up with a Google Map instead of a photo and that certainly looks generic.
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having your citations in good shape are really important, because once someone clicks on the image, everything below the carousel looks like some form of a citation to me
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you still need to do everything you've already been doing in terms of having a strong website, a clean Google+ Local listing, reviews and citations.
Beyond this, the next few weeks will point out strategy changes, if any, for local business owners to be aware of. This is going to be quite a ride!
Hope it helps!