Given how underwhelming iOS 9 has been (for me at least), I'm hoping iOS 10 will be more exciting and interesting. Design-wise, I really hope Apple takes more UI cues from OS X. The design language introduced in Yosemite looks and feels a lot more refined and matured compared to the still-amateurish look of iOS 7+ and while the latest OS X were inspired by the current iOS design language, there is plenty iOS can learn from OS X still such as: - The icons: While the OS X icons eschewed the excessive glossiness and whatnot, they have still retained their overall distinct and recognizable Apple style in which there is still a certain level of detail and depth with the icons without going too overboard like they did before. But compared to the childish and lazily done iOS icons, there does not seem to be a completely consistent look and feel between the platforms. I am not saying that by redesigning the iOS icons, they have to be completely identical to their OS X counterparts, but they should evoke the same design language. For example, the icons of iOS 6 and below were not always exactly identical to how they looked on Mavericks and below, but they shared and similar look and feel but now there seems to be a greater visual gap between the platforms. - The buttons: One of the worst aspects of the iOS 7+ UI have been the 90s-style HTML-esque "buttons" which look tacky and poorly designed for a touch-based interface. The buttons on OS X have retained the traditional looking action buttons which are clearly defined and easy to spot out. It's a bit ironic in a sense that a point-and-click interface retains obvious looking actions buttons but not on a touch-based one where it is way more necessary. - The app windows: In iOS 7+, one of the common complaints about the design was the overall whiteness and I'm glad Apple didn't cary that over to OS X. On OS X, the app windows are a relatively pleasant looking translucent gray which not only enhances the blur effects but creates a better contrast on the display. Feature-wise, I'm hoping that Apple: - Completely re-thinks their music app after the ********* that is Apple Music, maybe spin off the streaming service into an optional downloadable app in the App Store and have the default music app look and function the way it did back in past iOS versions (specifically the perfect iOS 6 music app) - A dark mode - A social media widget for the Notification Center (if it's part of the OS X notification center, why not iOS?) - The ability to reject a call on the lock screen (like in iOS 6) Lastly, Apple needs to restructure the core stock apps and spin them off from the main OS for 2 reasons: 1: So that Apple can continuously improved and refine their stock apps through the App Store without relying on full OS updates. 2: By doing this, all the stock apps are removable (but obviously downloadable through the App Store) so that users who rather use a third party app or just simply wanna save space on their devices can do so.