John Moe of The Marketplace Tech Report joins Madeleine as he does every Thursday to run down the top tech stories of the week: Amazon is launching a new smartphone app, called Price Check. You go into a store — an actual physical bricks-and-mortar store — find an item, scan it and the app will show you the price on Amazon.com. Then, Amazon will knock an additional 5 percent off that price if you buy it using the app. Hulu is looking at adding facial recognition technology, so you can click on an actor's face and get a pop up of their Wikipedia entry so you can learn more about them and find their big roles. And twitter's top hashtags of the year.