The fiercest wearable at Apple's iPhone keynote event has already achieved peak Internet fame. Keynote Scarf is the subject of a Twitter account that pays tribute to a developer's fetching purple infinity scarf. It's the new black turtleneck. It's the new untucked shirt. It's the new everything. PAY ATTENTION TO ME #AppleLive #scarf #AppleEvent pic.twitter.com/DyIYGnXion— Keynote Scarf (@KeynoteSc