Apple never gets around to addressing every little latest feature that it's made to iOS updates during the WWDC keynote; there is just not enough time.
They normally have a whole bunch of pretty pictures on a big slide, but they did not do it this year, instead, Apple has posted a pretty comprehensive website of everything new in iOS 12.
Here are some of the cool, smaller features that they did not get to on stage:
Federighi mentioned how apps will launch faster, the camera opening quicker, and the keyboard popping up more swiftly, Apple claims that in general, iOS 12 has speedier animations. "When you do things like bring up Control Center, swipe while multitasking, or scroll in apps, it’s more fluid and responsive."
iPhone X-like gestures on the iPad
Apple is trying to create a more consistent feel between its gesture-controlled iPhone X and the iPad. By swiping down from the top right corner, it will bring up Control Center, and a swipe "from anywhere on the dock" will bring you home. A replication of the iPhone X's swipe from the bottom to reach the home screen.
An easier way to use two-factor authentication
Users no longer need to switch over to Messages to copy and paste a two-factor authentication code with apps you are logging into. It sounds like iOS 12 will now recognise these codes for you, and suggest them as an autofill option. However, it’s always better to use a code generating apps like Google Authenticator or Authy, but if SMS is your only option, at least it’s less of a hassle.
Password sharing between your nearby iOS and Mac devices
With iOS12, Apple will let users conveniently grab a password that might be on your iOS device, but not on your Mac and vice versa. You could theoretically already copy and paste this stuff between platforms thanks to Continuity, but this might save you a few seconds or steps. Apple lets you share Wi-Fi passwords in a similar way, so this feature will probably work much like that.
Siri can help you find your password
While we’re on the subject, Apple says that Siri will be able to quickly display a particular password that you request in iOS 12.
Siri will gain more knowledge
Apple is expanding Siri’s knowledge base with information about famous people, motorsports (standings/schedules/rosters/stats) and food. You’ll be able to ask the digital assistant calories specific food-related inquiries like "How much caffeine in coffee?" or more general questions like simply asking how healthy a given dish is.
Critical alerts that can bypass Do Not Disturb
iOS 12 introduces new "critical alerts" that must be opted into by the user. Critical alerts can get a notification through even when you’ve got Do Not Disturb activated. Apple cites healthcare providers that need to send an urgent message as one use case for critical alerts.
Improved RAW photo support
Apple has slowly been making iOS more capable when it comes to supporting and editing RAW image files, and iOS 12 continues that effort. The new update will enable users to "import and manage RAW photos on your iPhone and iPad and edit on your iPad Pro." Some of this is already possible in iOS 11, but hopefully, Apple is making it easier to separate RAW and JPG versions of a photo and edit natively in Photos – at least on the iPad Pro, it seems.