Siri is rumored to be coming to the Mac and third-party apps with an official Siri software development kit (SDK). In addition to teasing a dark mode in iOS 10, Siri seems to be also trolling Apple fans worldwide with an unusual reference to OS X Finder when asked to “open settings in the window.”
There are no windows in iOS, of course, so one would expect Siri to respond with an “I don't understand” whereas she in fact says that “It doesn't look like you have an app named 'Finder'”, as first spotted by Brian Roemmele.