"Every once in a while, a revolutionary product comes along that changes everything." That was Steve Jobs talking in 2007, as he was about to introduce the first iPhone. He was right about it being a landmark. But he was also correct that it was a once-in-a-while event. Most products—including Apple ones—are merely evolutionary and only change some things.
Fortunately, Apple isn't just an expert at revolution; it also does evolution uncommonly well. Consider its newiPhone 4S, which went on sale on Friday. (The company loaned me one for review.)
As the 4S's very name acknowledges, it's no radical rethinking of last year's iPhone 4: There's a lot that hasn't changed at all, plus a few major new features and some minor tweaks. That's prompted somegrumbling, but it's okay: The iPhone 4 was an exceptional phone in the first place, and the 4S is that much more exceptional. And one new arrival—it goes by the name Siri—might just turn out to be the beginnings of a bona-fide revolution.