Google might end up buying Wikipedia

In it's Official Google Blog: Encouraging people to contribute knowledge Google announced that it is going to launch service similar to Wikipedia. But I think it might not succeed. Remember Google Video, which was launched to rival the already popular YouTube. It flopped and Google, to enter video sharing business, had to buy YouTube. I foresee similar fate again for Google. It might buy Wikipedia to get in to the business of knowledge sharing.
To prevent this the founders of Wikipedia will have to put Ads on it's site.