A couple of things to consider: 1. Firefoxers are the more progressive users to begin with (and more willing to try new things) so you're going to see FF lose more market share in the short run as people spend some time feeling Chrome out. Short term usage stats aren't going to be as useful for this reason for judging "true" market share in Chrome's beta stage. 2. We can expect IE to lose more market share in the long run - although we in the tech community know and love Firefox, it's not a household name the way that Google is. People who are still in IE (booo hiss) might be more inclined to try Chrome because they trust the Google brand. 3. The rise of the Google suite of apps is something to watch - as people move to google apps, and away from Office etc, there will be a natural incentive to go Chrome too. 4. Looking forward to the first commercial versions of Chrome on mobile phones. That'll definitely shake things up. - Steffan Antonas from FriendFeed MT Plugin