By now you've heard that the 7-packs have been replaced with 3-packs. The real reason I think they're doing this is to keep it looking the same as their new paid advertising service they're launching called "Home Service" ads.
In a nutshell it's basically adwords for local, but the business has to pass a third party background check to participate.
I have an insider at Google who I spoke with about this and word is that it's in BETA right now only in the San Francisco Bay Area and they're only testing it out for Plumbers, Handymen, Cleaning Services and Locksmiths.
Depending on how that test goes they could potentially deploy it in other areas and other markets, but only time will tell.
I've got a video here with more of my thoughts: Snack Pack — Paul James
I figured it's always good to share info and hopefully others out there that have information that I don't will share as well so as a community we can grow together!