https://www.cnet.com/news/samsungs-foldable-phone-is-real-and-extends-into-a-tablet-infinity-flex/

"The Infinity Flex Display represents an entirely new mobile platform," Denison said. "We've been living in a world where the size of your screen can only be as large as the device itself. We've added a new dimension to help you browse, watch and multitask like never before." 

The foldable phone can run up to three apps at the same time, something Samsung calls Multi Active Window. Google's Glen Murphy, head of Android UX, took the stage after Denison and said Android will support the new foldable display technology.