The smartphone wars aren't over. The fight has just shifted from what's inside the phone to what new things the phone can do. One of the key showdowns is over augmented reality — mixing the virtual and real worlds. And once again, it's a battle between Apple and Google, both of which are trying to pitch their mobile operating systems as the best place for AR content.
Why it matters: This will be a billion-dollar battle between two of the largest companies on Earth and the results will define the next generation of smartphones. (Oh, and Facebook is involved, too...)