If Linux is to take over it must come PRE-installed, Must be fully compatible (read: plug-n-play); even with the weird printer your aunt found in a garage sale, at-least feel familiar to the majority of users… and for corpos… run MS office (read: excel) natively.

Or we could just not care if it "takes over"?

Even if Linux was and did all of those things -- and many of them are already crossed off of the list -- it may not "take over" and despite some corporate spend from some of the backing corporations, it's not really a profit driven ecosystem. Linux doesn't have to take over and do exactly what Microsoft does, Linux is just fine as is.