Well, Chorno, limited userbase being the number 1 reason. The 3D0 wasn\'t a great seller, but still..
Anyways...
MS would have to buy huge developers and kill the other companies. A company like Sony won\'t back down. Sega would be the first to go, as they aren\'t making enough money right now, and I love Sega, so it hurts me to say that. Nintendo, keeps shooting itself in the foot by limiting its fanbase. Sure, a few mature titles here and there, but not near enough. I wouldn\'t be suprised if it ends up with MS against Sony for along time (even after this "console war"). I don\'t see either company backing down from the other, and both will use "questionable" tactics to be the biggest and the best. But, I don\'t believe in any way MS will dominate the console market.