If you're into 3D satellite views, this is available in the Google Earth for iOS app. Google launched the 3D flyover stuff in that app a couple of months before Apple released iOS 6, so it's been around for a while.
If you have Google Earth already installed, then you can jump directly to that app in the swipe-left menu of the new Google Maps app (and it will even jump to where you were looking in the Google Maps app, so it's pretty seamless transition).
The little up and down arrows to the left of each post let you upvote or downvote a post. (If you're below the karma threshold, you won't see the down arrow.)
The purpose of voting is to sort comments on the page, so that you can save time by only reading the first (theoretically, the "best") N comments in a thread.
It's changed a few times over the years, so I wouldn't get your hopes up. I've lost and gained it before. I think it was around 100 when I joined, then it went up to 250 or so, now it's apparently 500.
If you're into 3D satellite views, this is available in the Google Earth for iOS app. Google launched the 3D flyover stuff in that app a couple of months before Apple released iOS 6, so it's been around for a while.
If you have Google Earth already installed, then you can jump directly to that app in the swipe-left menu of the new Google Maps app (and it will even jump to where you were looking in the Google Maps app, so it's pretty seamless transition).