Google announced they will show, when they have it, the older images they've taken of streets via Google Street Views, so you can go back in time.
Google Street Views has been taking pictures since 2007 and Google is going to let you go back in time to view those images as they are taken.
Now, if you see a clock icon in the upper left-hand portion of a Street View image, click on it and move the slider through time and select a thumbnail to see that same place in previous years or seasons.
It does not seem to be live yet but when it goes live, I am sure many of you will have a lot of fun.
Here is a fun video of this:
Forum discussion at Google+ and Google Maps Help.
