Like all previous years, this year probably isn't any different, and it won't be the break out year for Linux on the Desktop.
But... (there's always a but).
Something interesting happened over the last year. People I never expected to be Linux users have installed Ubuntu. My sister in law and nephew both count in this list. At some level "regular folks" have now come to Linux. I have no idea if this is a trend or not, but I find it interesting regardless.