There’s a new release of Google Play services, which brings some love to the long-unrevised Maps API, and introduces Photo Sphere APIs. The world hasn’t figured out how big a deal Play services is; one of the highest-impact changes in Android’s history.
Historically, big new features in Android required Framework revisions, which require major releases with updates right down into the Linux kernel, which only ship twice a year, and which aren’t reliably made available on older devices.
Play services allows the Android group to ship major new features (OAuth 2.0, Mapping, and Photo Sphere so far) in a way that is auto-refreshed on all compatible devices back to 2.2 “Froyo”. That’s a lot of devices. That’s a lot higher impact than all the new magic that rolls out any one major OS upgrade.
Seriously: Pay attention to Play services.