There is probably going to be a session later this week, the reference seemed to imply they are integrating Swift into Webkit project for new development.
Most likely not, for Apple what matters for Swift on Linux, is being a good server language for app developers that want to share code between app and server, with Apple no longer caring to sell macOS for servers.
Everything else they would rather see devs stay on their platforms, see the official tier 1 scenarios on swift.org.
