These areas of interest are now shaded light orange are meant to highlight "places where there's a lot of activities and things to do" like popular business districts or neighborhood strips. According to the Google Maps blog, these areas are determined by "an algorithmic process that allows us to highlight the areas with the highest concentration of restaurants, bars and shops," although some additional human interaction is apparently needed to determine the busiest spots in high-density areas like New York City.

Here's that new feature in action, showing some busy neighborhoods in beautiful, Oakland, California:

In addition to the new highlighting, Google Maps is also getting tweaks to the color scheme that should make it easier to identify everything from parks and natural features to hospitals and highways. In other recent updates, Google also added the oh-so-handy multiple destinations feature for mobile directions and even higher resolution imagery in Satellite view.