Robert_Charlton - 8:04 pm on Mar 29, 2013 (gmt 0)
That's just one more paid "feature" to reduce the impact of organic.
I haven't seen this in serps yet, so I currently have no reactions to it. It may or may not stick.
Worth noting, though, that when Instant Previews for organic results were first announced, some members felt that Instant Previews for organic would be hurting organic, and some felt they would be obscuring PPC. See discussion from Nov 2010...
Beyond Instant Results: Instant Previews - officially announced