I wonder how long Apple will continue to offer the iPod Touch and keep refreshing it? This seems like a modest refresh. It looks like they are putting almost all their effort into the iPhone and the rumored iWatch in the mobile space, and not really doing much with the iPod Touch.
Apple obviously has a reason for Sapphire to be used in their future products. Apple, being Apple, will probably keep its intentions secret until it reveals any new products. We shall see what Apple chooses to use it for.