Sometimes you have to run out for a meeting seconds before you're able to commit to a well-researched online purchase. Fret not though, Google Now is here to help. The card-based system will display the items that you're longing for when they're available from a retailer you're passing by. All you need to do is update Search for Android and the software will remind you of the products and pricing info, allowing for a quick stop on the way home. That's after you find your car, natch.