A virtual desktop inPrivate setting

Would anyone find an inPrivate virtural desktop that automatically did not track any documents, web sites, programs, etc. to be useful?

I think it would be great for people who own their own business and use their computers for dual purpose business and personal. By allowing users to not log random personal or possible sensitive personal\business finances.

I’m sure others could come up with additional legitimate reasons. (Besides the obvious porn reasons. LOL)