iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Mac OS X 10.7 Appearing in Web Logs, Dev Release at WWDC?
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_7; en-us) AppleWebKit/532.7.1 (KHTM
L, like Gecko) Version/4.1 Safari/532.7.3
Rumored features that never made it into Mac OS X 10.6 Snow Leopard such as the Marble interface revamp may make their way into 10.7.