Funny enough, I got an Apple TV 4K a few weeks ago. Then, on Monday, I happened to remember the WWDC keynote. So I downloaded the Apple Events app, and watched part of the keynote live on the big screen. Thought that was pretty cool.
In terms of announcements, I was relieved to see improved parental controls coming to iOS (both iPad and iPhone). These days, getting and keeping my kids off their electronic devices is a major PITA. Between Xbox, iPads, iPhones, and MacBooks (most handed down from me), it's virtually impossible to keep a lid on it. Argh!
All the other incremental fixes and upgrades sounded nice enough, too. I look forward to updating all my compatible devices in the Fall.