Finding the secret to success, however, has proven most difficult. It's easy to see why Facebook succeeded -- it delivered the right experience to the right users at a time when its chief competitor, MySpace, was getting ugly and unwieldy. And Twitter scratched the itch for those who wanted to quickly express themselves. But why did Google's ill-fated Buzz fail where Pinterest has succeeded? Why is the iPhone our favorite smartphone and not the Nokia Lumia 900?
Via Don Dea