So far, the idea of an Apple-made ‘iRing” has existed only in the fevered imagination of Cantor Fitzgerald analyst Brian White, who breathlessly predicted last year Apple would release such a device as its remote control for the similarly mythical “iTV.” However, designer SCAVids has decided to give the iRing a tiny amount of life by incorporating it into a new iPhone 6 concept video that imagines using the wearable computer as a perfect complement for iOS 8′s upcoming fitness-related features. Among other things, the imagined iRing will be able to measure your heart rate, take your temperature and even serve as a “mood detector,” which gives it a very 1970s vibe — if only the designer had figured out a way