Apple has just announced that iOS 11 will be landing for current iOS devices that can support it, on September 19th.
iOS 11 was announced back at WWDC 2017 and brings many new features to it, including a radical new way to use the iPad. Control Center is now customizable and really allows each user to make it their own. Notifications have been redesigned, as you now pull down and then up to view even earlier ones. In conjunction with macOS High Seria, Message will sync across all devices through iCloud as well.