[citation][nom]killerclick[/nom]Quibble all you want, but Linux is much more important than Windows in terms of what's running it and what depends on it. Microsoft's importance in the grand scheme of things is diminishing every year, and the Windows 8 debacle will make that clear even to die hard fanboys.[/citation]
Linux has one singular flaw which keeps people away; It is not a unified OS like Windows and OSX are. The reason Linux is so popular in the server market is because of security, and that it is moldable by the user to suit a specific need, and has the ability to turn everything not needed off. Linux is popular on phones because it is dirt cheap, and phone manufacturers can have a higher profit margin using android (and again, modify and lock it down to their specific and stupid requirements). If we were to seperate phone hardware from the phone OS I could almost guarantee that linux/android would be on the bottom of the pile again.
I am not saying that linux is bad (I have used several versions over the years), just that when it comes to choosing which flavor of linux the average user is simply dis-interested because they do not want to learn to be a CS major just to use their computer. They want something that simply works, is supported, and can run all of the standard software on the market. Linux has gotten much better about the 'simply works' and 'support' aspects (though still far from perfect), but they still lack major software support from a lot of big name companies.
Personally, I think that win8 (or at least metro) will be a delayed success. A lot of people will be put off by the start screen at first, after a year or two into it, and people see it in use then they will move over. As an example, my MIL who is entirely computer illiterate, was able to figure out win8 on my computer after just a few minutes. I just had to explain that the start menu was replaced by the start screen, and that the charms menu was there to change settings/features and then she used it just like any other computer. Yes, she still struggled, but no worse than on win7, and she enjoyed having the live tile information on the start screen (something I could personally do without). I think a lot of the complaints about win8 are simply overblown.
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I don't understand why steam or blizzard feel threatened by win8. Yes, there is a store front, but it will be mostly for metro applications because software makers do not want to give 20-30% of their profits to MS just for the 'privileged' of selling software. With that fee model it would be cheaper to sell titles on systems like Steam, and steam offers many other great support mechanisms for both developers and gamers which the Windows Store simply cannot offer. For the x86 versions of win8 there is nothing preventing services like steam from running, and with the new win8 APIs there will even be neat new ways for steam to integrate into win8's social and cloud functionality which could be pretty neat.