In web analytics we track, tabulate and analyze data from all what is displayed (and not) into an internet browser.
Today the most normal things we display in a web browser are websites, blogs, and so on. But the desktop applications are installed in every computer so today we have part of the information of what every person do with a computer.
The trend in a short term future is the all the desktop applications are going to be online (thanks God), no more installing hundreds programs after formating or changing your PC.
But the thing is, does it became a web analytics task to analyze not only the websites but the applications? I mean at least the companies that provides those applications will need to understand how and when people use them. So my point is, if we are going to be more and more browser based its important to define the limit among private and public information.