Google Knol, a Wikipedia rival?

The main difference between the two is that Google Knol puts the spotlight on authors and their opinions while Wikipedia strives to be factual. To that extent it is more a Squidoo or an about.com rival. It is very early day but the obvious pitfal for such venture is to prevent articles from turning into disguised sales pitches. Another concern is that Google will favour Google Knol articles over Wikipedia in its search queries.