JS_Harris - 3:40 pm on Jul 24, 2013 (gmt 0)
Google is testing logos in other places as well. I saw a university logo in Google citations recently but didn't think anything of it at the time. You can even see site favicons next to adsense text links, this seems like a concerted push for brands and branding.
Tip: If you're going to embrace Google's efforts around logos then I suggest you ensure that your logo fits in a square space. I've seen two logos appear in the knowledge area that were skewed because they were not square. I'm sure Google will fix the ratio aspects soon enough but why make it hard for them to show your logo?