This Ars Technica piece http://arstechnica.com/apple/2013/06/the-global-influence-of-ios-7s-design-language/ http://arstechnica.com/apple/2013/06/the-global-inf

This Ars Technica piece http://arstechnica.com/apple/2013/06/the-global-influence-of-ios-7s-design-language/ http://arstechnica.com/apple/2013/06/the-global-influence-of... has a similar piece which is good too, pointing out that the app switcher seems to trace back to WebOS. Actually, the big, high and centred, skinny-lettered and unbordered time display on the lock screen always reminds me of some Sony Xperia lock screens, though maybe that's just me.