What was your favorite Google I/O keynote announcement?

What was your favorite Google I/O keynote announcement?
The announcement section is over, and all that's left of the Google I/O 2013 keynote is a question and answer section with Google CEO Larry Page. There have been a ton of announcements across all of Google's products from Android to the web to iOS and more. So, the real question is: What was your favorite Google I/O keynote announcement?

If you need a refresher on all of the announcements, there were: new APIs for location tracking, Android Studio, Google Play Games Services, Samsung Galaxy S4 with stock Android, Google Play Music All Access, new WebM and WebP formats, new one-tap Checkout button, Google Play EducationGoogle Hangouts integrated messaging app, Google+ UI and Photo updates, voice search and Google Now improvements, and Google Maps updates.

Let us know in the poll, and in the comments!

What's your favorite Google I/O keynote announcement?

Google Play Games Services cross-platform
Samsung Galaxy S4 with unlocked bootloader and stock Android
Google Hangouts integrated chat app
Google+ updates to UI and Photos
Google Maps updates
Google Play Music All Access
Voice search and Google Now improvements
Google Play Education
New WebM and WebP formats
Android Studio with smart IntelliJ-based IDE
Google Maps tracking APIs
Google Checkout button


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