The same thing they did for when iPod sales declined (as they have): more new products in the pipeline (which they have).
My opinion is that Apple's strengths only really work in new things, and not for mature products. So, they have to keep finding new waves to ride (which is where they like to be anyway). Fortunately for them, one can also introduce a new thing into an old market (e.g. music, phones, tv, textbooks).
To answer your question: iPad, iTV, textbooks - and probably others. Note that the iPad 3 will have the resolution to display diagrams from textbooks (which the kindle didn't).
BTW: it's curious that the iPhone is still growing faster than the iPad. Maybe because the iPad 3 was delayed. Though, 128% and 111% are both OK :-)
My opinion is that Apple's strengths only really work in new things, and not for mature products. So, they have to keep finding new waves to ride (which is where they like to be anyway). Fortunately for them, one can also introduce a new thing into an old market (e.g. music, phones, tv, textbooks).
To answer your question: iPad, iTV, textbooks - and probably others. Note that the iPad 3 will have the resolution to display diagrams from textbooks (which the kindle didn't).
BTW: it's curious that the iPhone is still growing faster than the iPad. Maybe because the iPad 3 was delayed. Though, 128% and 111% are both OK :-)