Dan Provost on the 4-inch iPhone debate:

If Apple begins asking developers to make their apps have a “flexible” UI (to be compatible with 3:2 and 16:9 iPhones), when a notification banner appears the top navigation bar could simply nudge itself down. This would greatly improve the unobtrusive quality the banners strive for.

That’d actually be great, if the 16:9 screen is really only 16:9 when viewing a video, the remainder of the time it affords for widgets to sit above or below the normal app content. I could get behind that.

Dan also does a great job of mocking up some potential iPhone screen changes.