Linux does have some advantages over Windows, but the reverse is also true. Windows also has an entrenched position in workplaces as well as in the home.
YMMV, but as far as the office/corporate world goes, my experience is that in recent years businesses have realized how screwed they'd be if Microsoft puts out a dud, and have been shifting towards platform independence and web-based tools. It started with Vista, but businesses were able to skip Vista and go to 7 (and some of 'em are still using XP), and most of what I've heard is that businesses don't like Windows 8. Because of this, they've been moving towards separating themselves from the need to have a specific platform. If 9 is as bad as 8, then it'll be the final nail in the coffin.
For my work, for example, most of the tools I use no longer require a Windows environment. We do have a handful of system monitoring tools that were written specifically for Internet Explorer, but those tools are becoming few and far between, and we can always use citrix for those while we transition. Within a couple of years, it will probably be quite easy to make the business case for at least giving users the option of whether they want Windows, Mac, or Linux, if not transitioning to one of the non-Windows platforms entirely.