Opinion: 5 reasons why the Apple Watch will fail

Earlier this week I listed five reasons why the Apple Watch will succeed, and now I'm back to look at the glass half-empty. The device is sure to sell like gangbusters out of the gate, but to achieve long-term success, Apple needs to find solutions to the following problems.1. It lacks a defining must-have featureThe iPod promised a thousand songs in your pocket; the iPad packed the most popular functions of a PC into a portable package; and the iPhone brought smartphones out of the BlackBerry a