Orion on iOS lacks the Share menu's "Add to home screen" functionality that lets Safari put a bookmark with icon (if the website offers an appropriate
apple-touch-icon image) on an iOS device's home screen. This would be very helpful to have if Webkit makes it available and/or Apple doesn't block it.
I don't see this functionality in the iOS versions of Chrome or Firefox, either, which leads me to believe it's Apple's doing. I hope not.