Normally, the map just shows icons and pins of where the hotels are located. As of right now, all I see are pins for the hotel location on the map. But in Sergey’s screen shots, Google is showing the actual prices.
Here is a screen shot:
When you click on a price label in the maps result, it will select in red and load the hotel details below as illustrated in the image above.
Here is an animated GIF of it in action from Sergey as well.
Forum discussion at Twitter.