There is a big difference between Apple's and Microsofts behaviour: Microsoft are (ab)using the billions of monopoly dollars they rake in from Windows and Office to become dominant in other markets, too. See for example selling Xboxes below production costs just to drive competitors out of the market in order to rule over the home TV set. Similarly, they will use their power and billions of dollars that they made from their two monopolies and try to drive Apple out of the tablet market. Whereas Apple does not use their billions they made from their iPad monopoly to get Microsoft out of the PC market, right? That's the big difference. Apple just defends their own market, whereas Microsoft wants to rule the world.