In 2010, it scooped up , which had some Google-Earth-like technology, and in 2011, it added to the fold C3 Technologies, which makes 3D maps that are so arresting they look like aerial photographs.

Add to that Apple has been collecting traffic data for two years to create a database for a potential traffic map app, and the handwriting really appears on the wall for Google.

Maps aren't the only changes predicted for the next version of iOS. It's expected to have better integration with Facebook. That could include better photo sharing, system-wide authorization of applications, integration of Facebook events with Apple's calendar app, as well as its chat feature with Apple's messaging app.

Siri may also grab some attention at the WWDC. Apple may announce it's extending its voluble digital assistant to other iOS devices, such as the latest versions of the iPad.