NeXTstep was built with a Mach kernel and a NetBSD-like OS layer above it to give it a BSD-Unix/POSIX like environment. OSX is based on NeXTstep with significant modifications over the years.
I honestly have no idea why anyone thinks this is a good idea, at least in terms of a business manufacturing decision. If you could wave a magic wand and make it happen, sure. But the design decisions that go into making an Android platform and a Windows platform are completely different, and attempting to make something that is optimized for both is likely to fail, and something that is optimized for neither is definitely going to fail (as no one will want to buy it).
Desktop PCs can afford to throw hardware resources away on tasks, so running Android in a hypervisor (perhaps with some dedicated hardware support) makes sense to me. Dual booting makes no sense to me.
My guess would be the manufacturers of desktop hardware are trying to figure out how to keep their businesses afloat. We are at a point where computing is moving away from the desktop/laptop model. Some of you will no doubt think I'm crazy, but I don't believe the cell phone nor the tablet has much life left either. Probably no more than 15 years tops. We are moving into the world of implanted technology.
While it's being pioneered for people with disabilities today, it will become a necessity for all as those who are paraplegic, for example, will not only return to full functionality but will be able to surpass those of us without the disability. A person who cannot hear today will be able to hear better than a purely biological human. The non-enhanced human if you will. And, obviously, immersive gaming comes with this tech. So does immersive movies.
What did we do for the last 8 years? Beat up our keyboards and mice and joysticks to do what? Beat the hell out of hami, hellions, skulls, clockwork, etc. using a screen, a window if you will into that world. What I'm saying is in 20 or so years, we'll look back on CoH and wonder how much more of the game could it have been. Imagine you flying over AP. Feel the wind in your hair. Look down to see your friends at the statue. Having real time conversations instead of typing on a keyboard. Punching Lord Recluse in the gut. Getting punched back and feeling it.
Now the manufacturers of desktops/laptops are trying to figure out how to extend the life of the systems they know. It's in vein. The death of their businesses will happen so long as they ignore the future. I fully expect them to try to make android work as a desktop OS. Apple will try the same thing with IOS. It's inevitable.
You don't know why they think it's a good idea? Because they don't know what else to do.