Apple's now no longer the world's most valuable company, with Exxon taking #1 again. My opinion is that this is just the start of selling, and they'll continue to plummet until they reach ~$250/share.
I just don't see any groundbreaking product coming out again; most, if not all, of Apple's growth stemmed from the iPhone. With the release of the crappy iPhone 5, plus the passing of Jobs, revival doesn't seem probable.
They'll still be a good tech company, but nothing of what they were in terms of true innovation. And once they go overseas, trying to appeal to China, they'll really drop. I bet Jobs would roll over in his grave if he caught wind of manufacturing a cheaper iPhone.
I don't think Cook would be considering going abroad if he didn't feel the company was in danger, which says a lot to me.