for personal use and comercial use .....we human being need both of it...because both of them got pros and cons. For designer we need ADOBE...and we cant live without it. For aggresive user, linux is the best choices. Security wise, free license, upgradebility and customization are excellent reason why expertise field using linux. Dumb user just go on with the windows unless you want to learn something deeper. It is good if one of them can stack each other...either windows with linux or linux with windows. It seems revolution is needed for greater invention of course we're happy with it. Linux is great when user are used to it ( take some times ) but when the fussy problem came your head will be mess. Why windows are easy to use?...because you pay A LOT OF MONEY TO microsoft so they have to provide easier and effective for their client...what you pay is what you got. Im happy if both of this OS can integrate and stack together, for dumb and expert user there is only one choice!..we shouldn't debate and compare which one is the greatest.