This year, WWDC will take place June 5-9 at the McEnery Center for the first time since 2002. Apple is expected to unveil the latest versions of iOS, macOS, watchOS, and tvOS. They may even unveil new hardware, like a new Mac.
Like past years, Apple will unveil the latest version of iOS. The next version, namely iOS 11, is rumored to include Group FaceTime and major Siri improvements. Also, iOS 11 is said to include many iPad specific updates, like expanded Apple Pencil support. The new version should ship to the public along-side the next iPhone in the Fall of 2017.
At the time of writing, there have not been any rumors regarding macOS 10.13. The next version, though is expected to be released in the Fall of 2017.
watchOS and tvOS:
Like with macOS, there have not been any rumors as of time of writing this post.
Recently, Apple invited a small group of reporters for a discussion about the Mac. During the discussion, Apple revealed that i has no plans for Touchscreens or ARM powered Macs.
Matthew Panzarino, reporting for TechCrunch said:
It's worth noting that, when asked about a touch display here, in the context of efforts like Microsoft's Surface Studio, Schiller replies "No." "That's a whole other long discussion we can get into, but suffice to say, it's not a big need of the Mac Pro customers that we're trying to address," he says. "You mentioned again how we're talking about both the iMac and MacBook -- I do think that we have a two-prong desktop strategy with both iMac and Mac Pro, we think are each going to be important for pro desktops."