[pesty4077]

Overall I think Apples penetration is a good thing. Here are some things to think about...

Consumers now demand that software work multi platform. Many people who own an iPhone are PC users, but some are also converting to Mac. I see more development in multi platform standards. Examples like HTML5 and browsers that are not IE, and even Steam supports Mac for games. There is pressure to make sure that closed software is multi platform. Like MS Exchange works on iphone, which previously might have been an MS only thing.
There is innovation coming from both Apple and non Apple products that are keeping things in check. Apple has made some good innovation, so it's good that the open community are hitting back.
I don't think Apples penetration is overly worrying yet, it's good that they are going strong. I'm sure if Apple stop innovating then eventually it will become evident and they will lose popularity.