Some of Hot Hardwares articles seem to cater a bit to Apple. I think Steve Jobs was a genius as a business man. Steve was the backbone of Apple and without him they have lost their competitive ferocity, their solid business structure, and a good chunk of ingenuity. The only thing that apple has left going for them is their ginormous bank account and the recognition that was brought to it by Steve Jobs. The only thing Apple has ever really been good at is making money and making things look pretty.
Competition is good (even if Mantle doesn't seem to have much of a chance) If it helps to make Direct X a little better then that's a win for me. I feel sorry for AMD though, they have a lot of major competition to deal with in general.
I already have a dongle :P
The reason gamers don't use linux is because of the lack of support for gaming. I've been following the steam machine and this is a step in the right direction. It will be a good idea if it can overcome the boundaries like these. I will admit, it's probably not an easy job but I am rooting for it.
Mac's and PC's have different target audiences. Many PC users are Gamers, PC enthusiasts, Programmers etc. The people who have no need for open source software, extra customization, or freedom within their software and/or hardware have no problem using a Mac other than that it is more costly. I love PC's but I can understand why Mac has done so well with "the common rabble".