Google’s (GOOG) most exciting and innovative mobile service is currently only available on 15.5% of Android devices, but it will soon be accessible to nearly every iPhone and iPad user on the planet. A leaked promotional video picked up by Engadget reveals that Google Now, the Android feature that presents users with useful information driving directions, weather reports and traffic information before they even know they need it, will soon be available on the iPhone and iPad as a downloadable app. The video was pulled shortly after it was discovered on YouTube, but a copy can be viewed below.