The big hangup: Here's why the future is not just your smartphone

The once-revolutionary smartphone is losing its power to amaze - and maybe its singular hold on our lives

Steve Jobs took to a stage a dozen years ago this week to introduce a revolutionary new product to the world: the first Apple iPhone.

That groundbreaking device, and the competitors that followed, changed the way people communicated, ordered dinner and hailed a taxi. The technology world reoriented around the smartphone, supplanting the personal computer, MP3 players, the digital camera and maps. And the mobile economy was born.

Today, it looks like the era of smartphone supremacy is starting to wane. The devices aren't going away any time soon, but their grip on the consumer is weakening. A global sales slump and