So what's different between now and when the stock crashed so dramatically a couple of years ago? Lots of promises about new products but still nothing on the table. I disagree that Android sales are not eating into iPhone sales. iPhone sales have risen as they've started selling on more carriers in more countries. You can't keep doing that indefinitely. The iPhone sales growth has slowed dramatically over the past few quarters.
I'm not saying that Android isn't competition. But Apple was priced at a level that predicted DECREASED iPhone sales. Not decreased market share of the smartphone market which is obviously increasing and going to continue to increase until all cell phones are smartphones. But actually, in absolute numbers, less iPhones sold. The stock price predicted that if 2013 was 200 million iPhones sold, then 2014 was going to be 180 million. (I don't know if these numbers are right or even in the ballpark, but the point is if Apple kept selling about the same number of iPhones at about the same margin for just a handful more years, then the stock price was too low.)
At one point last year, Apple had a market cap of $400 billion or so, yet was making nearly $40 billion in profit. And its best product was in the smartphone space which was growing and is projected to grow more. The best explanation for that valuation was that folks were concerned that Apple would not be able to sell expensive and highly profitable iPhones in similar numbers going forward.
What has happened is that HTC, Samsung, and Google (and others) have come out with just about as good as anyone can imagine Android phones, and the iPhone sold like a champ right through those launches. Android will vacate the market for the next two quarters while they see what Apple can do. So Apple will be the "IT" phone for the remainder of the year. And it is just a great phone. Folks are figuring it out.
That said, I don't discount the possibility of significant retrenchment in the stock price. It happened before, and yes, until a new market category launches and is proven successful, the market could move against Apple again. If I were a short term trader, I would probably even bet on it (if I had to make a three month bet today).
But I think it comes down to smartphones and tablets. Everyone NEEDS a smartphone (you are less powerful without one, you need it). Everyone will WANT a tablet (it is about the same side as paper, which is a form factor that is relatively unchanged over centuries, but much more useful). I think there is plenty of room to run in these markets. Apple's market share might even increase, but is unlike to decrease faster than the market themselves are growing. So units sold will increase over time. (Note I maybe be wrong about iPads though because cheap tablets might be good enough and want may not be strong enough to drive massive sales at Apple's prices.) As long as iPhone sales continue to increase and margins stay about as strong, then a higher stock price will be justified.