I thought so too, then I saw that the marketing department decided to then prattle on about reductions in height and weight. They also show the phone side-on and there's no physical comparison to the earlier model showing the larger screen. The message wasn't very clear, and seemed to contradict itself.

In fact, it seems to be a play on words that the 'biggest change is the fact that it's so thin' and not the 'biggest change is the biggest screen'.