Linux penetration is still minuscule, I wouldn't plan out Windows funeral just yet.
As I said before, the only way Linux would achieve any sort of widespread penetration would be to create a distro that basically is as (relatively) ***** proof as Windows is. Which would probably mean locking out most of the functionality that makes Linux Linux. And IMO I don't think the purists in the community would support that sort of thing. They'd probably say if you want to turn Linux into Windows, just go ahead and use Windows.