Since about 10:30 am on Sept. 9, all the world can seem to talk about is the shiny new blockbuster-hopeful from Apple, which you dare not call the iWatch anymore. Critics have gushed over its sleek design, the "digital crown" navigation system, even the custom typeface that Apple has designed. But the central aspect of the device, while mentioned in every single report, has not generated all that much chatter. It's the data. More specifically, it's the potential impact of the data.