The majority of maps features that matter are all here: traffic, turn-by-turn navigation, transit directions, walking directions, satellite view, street view, indoor photos, Zagat restaurant reviews, and a bit of integration with your Google profile.
Mountain View just added 20 US museums to its battery of 10, 000 indoor schematics, including the de Young Museum in San Francisco, the Philadelphia Museum of Art, Cincinnati Museum Center, the Indianapolis Museum of Art, the American Museum of Natural History, 17 Smithsonian museums and the National Zoo in DC.