Chrome has been in development since spring of 2006. It has been around much longer than it has been public.
Just a guess, but they may feel that having the beta label on a downloadable app tends to turn people off, whereas people don't mind beta web apps (its the norm and they won't screw up your system).
Re:Google To Take Chrome Out Of Beta
by Lagged2Death on Wednesday December 10, 2008 @10:56PM
(#393921)
It could be something simple. It could be that the people who decide whether Gmail is a beta or not aren't the people who decide whether Chrome is a beta or not.
Makes me think... Why?