I know we all have been saying that the next iPhone will probably be a 5s, i.e. looks like the iPhone 5 with updated internals, but I wonder, what stops Apple from redesigning the external case (could be as simple as perhaps new material, rounded back, whatever) as well and call it the iPhone 6? I know Apple has had two Ss (3Gs and 4s), but remember, Apple redesigned the original iPhone when they released 3G. What's to stop them from doing that this year? Competition is heating up, pressure is up, and this morning there are reports about potential weak demand. I would't say weak demand, more like the buzz winding down after the holiday rush.