Google Play services 4.4
A new version of Google Play services is rolling out to Android devices worldwide. This update includes new APIs as well as a number of new features to existing ones:

Street View and Indoor Maps - Embed Street View imagery into your app & extensions to Indoor Maps.

Activity Recognition - Two new activity detectors have been added to Location API: Running and Walking.

Mobile Ads - In-app promo ads enable users to directly buy virtual goods.

Wallet Fragments - Makes it extremely easy to add Google Wallet Instant Buy to an app.

You'll be able to get started with the new APIs as soon as the Google Play services rollout is complete -- a process we expect to take several days. We'll then release the updated Google Play services SDK and you'll be able to download it through the Android SDK manager. Watch for more information coming soon.

For more information, check out the link below:

Developer blog post:
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