Editorial: Amazon and Google are undermining mobile pricing, and that may hurt everyone

When Google unveiled the Nexus 4, Nexus 10 and a refreshed Nexus 7 in October, the moment was arguably the crescendo of a change in the Android ecosystem that had been building ever since Amazon's Kindle Fire first braved the marketplace in 2011. Along with a widely expanded Amazon lineup that includes multiple Kindle Fire HD models and a price-cut tweak to the original Fire, two of the largest players in the mobile world now have top-to-bottom device businesses built around selling at break-eve...