I was browing thorugh all sorts of thing n900 and I came upon this article on InformationWeek. The article was so-so but I really liked the description of the desktop:

The N900 also provides some compelling "desktop" (mobile-top?) personalization features.

And just now I realized I totally misread it.

I read multi-top not mobile top. As you can see multi-top is far cooler and should clearly be put into all the marketing paper.

Multiple desktop running multiple applications all in parallel = Multi-top