I know Linux fans don't see it that way.. young me thought Linux was indomitable and it was foolish for any company and group of people to not invest all their time and efforts into it. Older me knows better, that's not how corporations and groups of people work best. It leads to stagnation and apathy. It kills the fertile ground for ideas needed to make non-linear progression.
I don't know the solution to all this, but systems software is really going the way electronics engineering and circuit design have gone. I am sure executive types without engineering background would love to "outsource" it all to the perceived interchangeable cogs in "low cost regions".. but the rate of technological progress is about to drop of a cliff if my generation doesn't pick up the torch real soon now.
That said, it is somewhat premature as another commentator points out IBM's CNK. CNK is inventor's thinking.. the gall to ask "do we even need a general purpose OS?" regardless of what the market or eventual answer may be.