I think what he meant is the appearance of images in the actual search results. I've too noticed this and as a webmaster I'm not sure if I like this since it pretty much distracts searchers from the actual page results.
But speaking of Google's image search, there seems to be a lot of experimenting going on too. Is it normal for instance to constantly have images pop in and out of one's site search results? (site:
Domain name registration, web hosting and VPS hosting | Domain.com)