that's great and all, but it still means we'll no longer be able to install linux on our laptops when the PC market starts shifting to low-power ARM notebooks/tablets that are quickly closing the performance gap with Intel/AMD and doing so without requiring a charge every 4 hours or so.
Microsoft is preparing for the very possible end of the x86 era, and us linux users are gonna be completely stonewalled when it happens. Backing off on x86 is nothing more than clever marketing. Microsoft is not at risk on x86, they don't care if you can install linux/Android on PCs, but it's a different story on ARM. All they've shown by backing off on x86 is that they're aware of how secureboot can be exploited to curb competition, and that they're very much willing to utilize it for markets where it's worthwhile for them to do so.