You can drive somebody else out of business without a revolutionary product. Look at how the US car companies got hammered by the Japanese for decades. Japanese cars did not fly or even hover. They were just better cars, but they still kicked Detroit's ass around the block again and again.

I'm happy to agree that Apple's App Store was a revolutionary approach to software sales, though. That really did transform a market entirely. But the iPhone itself was not revolutionary in the same sense.