I have said it in another thread and I will say it here, If there was an xMac that made upgrading graphics as easy as PCS for gaming (develepor support would come because of this) Apple would have Windows by the balls, why they choose to ignore this has got me stuffed. Its that simple!
In reality the markets are controlled and split up by powerful men. That's why one board member often sits on multiple boards. That's also why CEOs jump from company to company. --Keeps the cocktail club mingling and strengthens relationships among large corporations.
That's also why certain combination of desirable features only only exist on certain products. --Like lots of horsepower on AWD sedans. They say it's because of driving experience. But in reality only a small handful of sedans are allowed to have it.