I think I understand you aren't much of a Linux fan, but I can tell you from a professional point of view that it's coming. To desktops, laptops, servers, handhelds, etc. etc. Will it put MS out of business? Not a chance. But it most certainly [b]will[/b] become a viable option for many, many people. It already is.
And your proof of this claim is? There is none that I know of. The facts are Dell already tried to offer Linux on the desktop, but pulled it due to losses.
I understand you aren't much of a Linux fan, but I can tell you from a professional point of view that it's coming.
From who, on the desktop? Look at the top PC sales vendors, none offer Linux on a "desktop", only expensive workstations or servers sold to businesses that cost a premium. The day Red Hat or Suse can charge enough for their products to kick some back to Dell to pay for their support costs is the day Dell starts offering it preinstalled. Obviously that point is nowhere near.