I don't think we're actually disagreeing. I'm not saying that the average iPhone user has remarked "Core Graphics is great! It makes my phone so responsive and

I don't think we're actually disagreeing. I'm not saying that the average iPhone user has remarked "Core Graphics is great! It makes my phone so responsive and fast!". I'd be very surprised if any lay iOS user has ever said that ;) But the idea is the level of interactivity and the UX around iPhone would have been impossible without the platform Apple first built for OSX. Many other manufacturers at the time had UX ambitions like Apple, but were held back by their own platforms. This infamous video comparing the concept renders of the Nokia N97 vs. what shipped really demonstrates this: http://www.youtube.com/watch?v=vJpEuMidcSU http://www.youtube.com/watch?v=vJpEuMidcSU It's not that Apple didn't innovate on the UX, they sure as hell did, but rather that they bought themselves a huge lead on the competition by having, for all practical purposes, the only platform around that could even do something like that.