We have already posted a pretty thorough preview of the features coming with the new Google Photos app, but that doesn't mean Google didn't save a couple of surprises for IO. The big bombshell is that, starting later today, users will be able to upload an unlimited number of photos and videos for free.
[Update: It's Live] I/O 2015 - New Google Photo App Launches Today, Includes Unlimited Free Storage Of High Quality Photos And Video was written by the awesome team at Android Police.