https://www.cnet.com/news/samsung-offers-a-first-look-at-2019s-foldable-phone-galaxy-f-with-infinity-flex-display/

The foldable phone can run up to three apps at the same time, something Samsung calls Multi Active Window. A Google executive who took the stage after Denison said Android will support the new foldable display technology. 

Samsung made the announcements at its fifth annual developers conference, taking place Wednesday and Thursday in San Francisco. The event, which started off small at a San Francisco hotel, in 2016 expanded to Moscone Center West, where Apple previously held its developer conference. Last year, 5,000 people attended SDC.