From what I understand, the problem was Microsoft tried to use its dominant position with Windows to achieve a dominant position in the web browser space in a manner that was considered 'unfair'.
What Apple is doing isn't trying to use its dominant position in the market for mobile applications to achieve a dominant position in the market for development tools, nor even in the market for development tools used to write iPhone applications.
Conceivably, you could use TextMate to write your code.
Conceivably, Adobe could write a better IDE than Xcode for Objective-C and Cocoa Touch programming
What Apple is doing isn't trying to use its dominant position in the market for mobile applications to achieve a dominant position in the market for development tools, nor even in the market for development tools used to write iPhone applications.
Conceivably, you could use TextMate to write your code.
Conceivably, Adobe could write a better IDE than Xcode for Objective-C and Cocoa Touch programming