There are many measures you can use to gauge the influence of the iPhone, a gadget that has changed human behavior in ways that few other things could. But a good place to start is by looking at products that the do-it-all smartphone has elbowed aside en route to where it is now (which is everywhere).
The list of maligned objects is long. When was the last time you used an MP3 player or held a calculator? What about a physical map? Or a BlackBerry? Do BlackBerrys even exist anymore?
There might, however, be no better example than the camera, which has suffered mightily since the iPhone was introduced almost 10 years ago.
For a while, it was one big camera party. Sales grew modestly but steadily until the late 1990s. Then digital cameras were introduced, and demand soared. Thereafter, the industry grew quickly. That is, until 2007, when Apple launched the first-generation iPhone.
What happened next is pretty self-explanatory.