From Apple’s press release:

Apple is working with leading device makers to make it easy to connect to Bluetooth-enabled robots within the Swift Playgrounds app, allowing kids to program and control popular devices, including LEGO MINDSTORMS Education EV3, the Sphero SPRK+, Parrot drones and more. The Swift Playgrounds 1.5 update will be available as a free download on the App Store beginning Monday, June 5.

Getting all the announcements that they couldn’t fit into the keynote out of the way.