[thachmai]

A counter example:

How many people aside from specialists use the browser as their main "app"?

How many people use webmail, search and read info, use facebook/twitter, order stuff, use online map, look at internet junk?

The browser is the number one app on desktop without a doubt. The flexibility it offers is nothing short of incredible. You can cite specialist apps all you like, it doesn't change the fact that those apps are a niche right now on the desktop.