Sooner or later, companies will unfold. The OP is right on the line. Reminds me of Sony.
Saying the company will or is unfolding before our eyes is just a ridiculous thing to suggest.
I'm not seeing any issues Apple couldn't overcome in the short term (the next 5-10 years) and beyond that, I wouldn't give the OP credit should Apple go south after 10 years as you could argue that even societies will eventually unfold (and chances could be good that the US takes a digger before Apple does given where we seem to be heading politics-wise at least).
It's not like they're HP - another example of a tech giant that has gone from top to bottom in a short amount of time. HP has been producing undifferentiated crap in the PC market for decades and the inkjet market is punishing all players as consumers just keep cutting back on printing photos in general. It was easy to predict their fall because they just didn't have in place anything that could drive them forward in the same way Apple has. The same has been true of Sony.
Apple has the right fundamentals and focus in place to keep growing and adapting and forcing change. There are not a lot of companies like them now or that have ever been in the same situation they're in now.