I think he has it wrong, now is the time to buy while prices are lower, this is Apple, they will rebound. And really, I don't think China is going to be that important in the long run.
Sorry I'm responding late to the thread.
I am a big fan of Apple but this is a worrisome time for owners of its stock. You want to be able to say, Icahn is wrong. But what does Apple have coming into the product pipeline that is really going to improve sales? Nothing, seemingly. The iPhone 7 at least from all the rumors, seems to promise nothing new. The same size. A worse headphone connector that won't function with existing headphones. The same form factor. Yes, it will have a faster processor etc, but those kinds of internal advantages did not make the 6S a runaway success.
Also, on a very petty level, some of Apple's programs have become very hard to use. I was on a business trip recently and good Lord, it was very difficult to find out what TV shows and movies were actually downloaded from iTunes to my phone. Meanwhile Amazon's video app, Netflix's, and Hulu's, all have that divine simplicity that Apple used to embody. iTunes, in contrast, feels like a pretty baroque and multi-layered mess (at least to me).
iCloud? I don't understand how to use it. Other solutions like Dropbox have that Apple-like heavenly simplicity and "just work" without requiring you to be more of a technician than a user/artist/writer. But Air Drop? Apple Photos in the cloud? I can't make it work, they make feel like a dummy, and I imagine I am not alone in that feeling.
Then there's the fact that all the iPhones are coming with this stingy 16 GB of memory, when it would cost Apple very little to be more generous. That makes me think, they are propping up prices and margins in a way the market would not support otherwise.
Finally, there is the way iPad sales are in a multi-year free fall. Maybe the exact same thing is happening with iPhones. They're good enough. They last a long time. You don't need to upgrade. Not this year. Not next year. Maybe not even the next.
So that leaves future Apple products to save the day. But what? A new Apple Watch? A car?
Somebody please tell me why I shouldn't follow Carl and sell my stock. Because for the first time in a while, I'm having serious doubts about holding the stock for the longterm.