Apple’s AirPort wireless routers have changed form factors a handful of times over the past decade, shifting from classic iMac-matching pod-like shapes to rounded rectangles and squares. This week, Apple introduced two new AirPort routers: the 802.11ac AirPort Extreme ($199) and renamed AirPort Time Capsule ($299-$399). Both feature the same 3.85” square footprint and white plastic design of last year’s AirPort Express, but now stand…