gmb21 - 3:39 pm on Jun 6, 2011 (gmt 0)
I think it is the first step toward PAY TO PLAY SERPS
Already, if I search for a competitive phrase on Bing or Yahoo, there are only ads and a location map above the fold on my standard size screen. :(
Most users probably only visit the first couple of links they see at the top of the search page.