There will be a change that Google wants to make. They want to change the look of the Android icons as they would look like more the web-based version of Google products. It seems that Google would like to do more alike products and designs, as their products to be recognized easier..
Android Police picked up the new icons and it seems that it are more stream-lined as the older version of them. Now, the design looks different and more alike web versions. Below you can see the differences between the web version and other versions.
The thing is that the icons from Google for web and Android aren't even mirrored in their icons. Sure, making them to match it's important and gives a new look, but as we see there isn't a clear consistency in designing them. Is this a smart move or it's just change? Or Google want to make it's design clearer?