Enlarge / Left: The $379 Nexus 5X, Right: The $649 Pixel. reader comments 10 Share this story SAN FRANCISCO—Google just announced the new "Pixel" line, a super-premium set of smartphones costing $650 and up. Google users accustomed to $380 or $500 Nexus devices will find this announcement a tough pill to swallow, which begs the question: is the Nexus...