Doesn't seem like you understand what you are speaking to either. Your graph shows nothing about trend, and where that share is going or has come from. Not to mention it's month's old data. Surely you could have googled something more recent. Your post is also somewhat contradictory to your own point, as you show a graph to try and tout Microsoft's share dominance, but in the same breath, you speak to customer choice being a good thing.
As I was saying, as of 9/10, Netmarketshare shows Microsoft IE and Windows at record lows within the past several years and suffering from a massive imaging problem. Firefox, Safari, and Chrome have all made huge strides against IE, that started with all of the problems with Windows Vista. Same goes for phones and desktop OS's.
Your graph also says nothing as to why the marketshare is the way that it is. MS virtually gets its market share for free. It forces its partners to push price points while keeping its own margins high. This remains true despite falling PC prices, and the manufacturers (HP, Dell, etc.) don't experience the nice margins that MS experiences. You've already seen these manufacturers response to this in all of these new mobile OS's, where they've locked Microsoft out of the action.
Once trends begin, they are difficult for the losing end to reverse (i.e. Microsoft). The playing field is leveling out, which is a good thing for consumers. As Apple continues to plow the road with their iPhone into new markets, and will continue to grow share. If MS loses even half of one percent of their current share, they take a tremendous financial hit.
