Google might have updated the mobile local Pack display a while ago, who knows, but it seems to me a fairly recent change. The change makes for a more modern, cleaner business listing display.
The font size of the business name is larger and the buttons are subtler and now incude an icon for the action to be taken. The actual amount of space used is almost identical but everything seems larger to the eye. A subtle but effective change. It is interesting but in this context the map with the red pins are starting to seemed dated in appearance.
Here is a comparison of new and old display side by side (note the emphasis on the brand):
Because I so quickly forget what things looked like previously I am including a screen shot of the mobile local pack display that preceded this change. (Let me know if you happened to notice when this change happened):
Google Updates Mobile Pack Display by Mike Blumenthal