Also look for iOS performance improvements, more ways to use NFC technology, some redesigned basic apps like Stocks, and most importantly, Animoji news.
Traditionally a software developer's conference, the two big ones for WWDC are the next installments of iOS and macOS, which will then enter the consumer beta stage and you'll be able to try them ahead of their release in September/October. This shift in iOS' software development has been discussed for quite some time now; it'll be interesting to see exactly how Apple will accomplish this.
Apple is expected to unveil iOS 12, macOS 10.14, tvOS 12 and watchOS 5 during the keynote.
A new report from Bloomberg also suggests this, with rumors that much like Google in Android P, Apple is going to make a new "Digital Health" feature created to help you better manage your time on your device a big focus of iOS 12. Though, you do require Apple devices including iPhone, iPad, or iPod touch running iOS 10 or later in order to watch the live-stream.
Apple has said before that Dolby Atmos for Apple TV is coming, so rumours suggest it will be announced at this upcoming event. In fact, if done well, Digital Health could well become a selling point for Apple devices. The feature will also limit personal data sent to Apple served. What we can see is that the iPhone SE 2 notch is considerably smaller than the iPhone X notch, as has been suggested by previous leaks.
Exactly what Apple plans with its smart assistant Siri is not 100 percent clear, but as SiliconANGLE reported May 21, there's a strong possibility that Apple may be announcing enhanced conversational artificial intelligence for the service.
Developers and students attending the event will have access to more than 1,000 Apple engineers, giving them the latest details about the various APIs available to them, whether for SiriKit, HomeKit or HealthKit, etc.
However, if there are any new round watchfaces in the developer kit, we might get a glimpse of a future round Apple Watch.