Microsoft's anti-competitive behaviour was going to PC manufacturers and saying "if you put this alternative software onto your PC's then we will charge you more for all the Windows licenses you buy".
That's abusing your monopoly. You're the only reasonable choice out there, everybody uses your software, and you force manufacturers who know they have to buy it into taking it along with all your other conditions.
Apple's choice for what applications it allows on it's own hardware is totally different and in no way a monopoly. There are hundreds of other mobile phones out there, and a reasonable number of OS alternatives. The consumer has plenty choice. Nor is Apple strong-arming manufacturers to accept their terms to keep competitors out, they're simply choosing which apps to allow and which apps not to allow. It's their hardware, their store, their game.
People need to start realising that if you buy an iPhone, this is the way it is. Just because you can install anything you want on your Windows PC, or Mac, or Android phone or whatever else you have, doesn't mean that the iPhone HAS to be the same way. I can't download and install any game I want on my 360, PS3 or Wii, nor do they multi-task, and all of those manufacturers decide exactly what games they allow on their platform. And you know what, that's just fine by me. And I have a PC to play games on if it's not.
And if that's not what you want, exercise your consumer choice and buy an Android, or Nokia, or Samsung, or one of the many other phones out there. That's your freedom, stop tramping on the freedom of everyone else who is quite happy living within the Apple kingdom.