Google I/O 2013 opening keynote roundup: All Access music streaming, a vanilla GS4 and more

Phew. Day one of Google I/O is far from over, but there's already been an onslaught of news. While our editors are running around the floor, why not catch up on any bits of the opening keynote you may have missed? There's now a Galaxy S 4 with vanilla Android Jelly Bean for $649, a $9.99 per-month music subscription service and a host of updates for Google+, Play, Maps and others. Join us past the break where we've got it all neatly categorized for your viewing pleasure.
Android
There have been 900 million Android activations, 48 billion app installs to date
Google unveils Samsung Galaxy S 4 running stock Android Jelly Bean, available June 26th for $649
Google announces new Checkout button, one-click purchases on the go
Google Play
Google Play game services aims to integrate gaming across Android, iOS and the web, available today
Google Play gets dedicated chart for Android tablet apps, web redesign
Google intros Play for Education, a curated portal for apps and books
Google launches All Access music-streaming service in the US: $9.99 monthly fee
Google+
Google launches new Google+ Hangouts platform and mobile apps with focus on conversations
Google shows off Auto Enhance and Highlights photo-editing tools for Google+
Google Maps
Google outs new Maps and Location APIs, brings geofencing and low power location services
Google Maps redesigned with improved search and tablet UI (video)