2019's iOS 13 "Yukon" to focus on iPad improvements, redesigned home screen and more
If Gurman is correct, Apple will add in-app tabs, currently used on MacOS, and users will be able to call up side-by-side screens of the same app in Split View. In response to a tweeted response, Gurman did say that the iPhone will get some of the Springboard redesign that the iPad is getting.
Some rumors indicate that some of next year's "Yukon" feature set was to be included in this year's iOS 12. Apple reportedly decided to focus instead on improving performance and security with this year's new iOS build. We will see iOS 12 introduced next month at WWDC 2018. The annual developers conference will run from June 4th through June 8th at the McEnery Convention Center in San Jose, California.