The technology world is very fluid. Things change quickly. Any company/writer/website who claims they know what the situation will be in 2013, 2014, 2015 is full of crap. All we can really do is guess. So this is my guess:
Apple wants the tablet market (the tablet market that THEY created only 2 years ago) to end up like the MP3 player market. And they SHOULD want this. Any company that wants to be successful would want it. They are not just going to rest on their laurels and let iPad sales dwindle down to nothing.
They will expand the iPad product line similarly to how they expanded the iPod line. There won't be nearly as many different models--maybe just an iPad and an iPad Mini. But it will happen to a degree. I honestly think Android tablet makers' only weapon right now is making lower priced tablets, and to do that they usually just shrink them down to 7". If Apple puts a tablet in the market in the same manner, it will be game over for a lot of those rinky dink manufacturers that constantly just try to throw things against the wall to see what sticks. Amazon will probably continue to be competitive if they can figure out a way to make money off of their tablet hardware. Android fragmentation will continue to hamper things as well. ICS was supposed to fix this. It hasn't.
I'm not saying nothing ever will fix the Android tablet situation. Something could come along tomorrow that blows up my whole theory. But looking at the big picture, iPad is doing great, Kindle Fire is doing well, and everything else is dying on the vine. And the more time the iPad has to run away with the market, the more engrained it becomes as THE tablet to have. Just like the iPod.
The argument against this used to be that you can get a comparable Android tablet on the cheap by signing a data plan contract. Well, my parents signed a 2 year contract with Verizon and got their iPad 2 (at launch) for roughly half price. I read a story about a year ago that 2012 was going to be the year that Android tablets start killing the iPad because of subsidies like this. So far it hasn't happened.
Nothing you read on the internet should be taken at face value. Look at how Wall Street analysts and the media were able to manipulate the stock market out of thin air over the last couple of weeks. Much ado about absolutely nothing. Hell, check this out from 2010:
http://seekingalpha.com/article/227432-now-apple-could-have-some-problems
I hope you weren't investing your money based on THAT guy's predictions.
The internet is not real life. Web forums are not real life. Anyone can say anything they want. On the internet, it almost never means anything.