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
14.17%
Samsung Galaxy S4 with unlocked bootloader and stock Android
42.09%
Google Hangouts integrated chat app
6.44%
Google+ updates to UI and Photos
3.72%
Google Maps updates
8.66%
Google Play Music All Access
5.58%
Voice search and Google Now improvements
5.37%
Google Play Education
2.72%
New WebM and WebP formats
4.15%
Android Studio with smart IntelliJ-based IDE
4.44%
Google Maps tracking APIs
1.43%
Google Checkout button
1.22%

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