Andy Ihnatko nails a key difference between the iPhone and everything else:
If there’s a single feature that elevates the iPhone from the rest of the pack, it’s the way that it urges and enables me to maximize the amount of time I spend thinking and doing and creating, each and every day. I’ve got ten minutes while I wait for a burger to arrive, three minutes at the post office while as a clerk explains the concept of a “forever stamp” to the unenlightened, six minutes waiting in the subway…it all adds up. I leave the house with my iPhone in my pocket, and I come home with new photos, new drawings, a few tiny things written, many pages of books read, and a better sense of the news of the day.
I accomplished (okay, “accomplished”) all of that in crumbs of time that otherwise would have gone to waste. I don’t get that sort of effect from other phones…least of all from Android devices. If there’s a signature advantage to iPhone’s apps, it’s that you’ll want to use them.