I couldn't tell them that I'd been waiting all my life for this call. All I could say was, "Yes, of course!" I wrote the entry. And I included a photo of my student Caitlin Kelleher wearing a virtual reality headset.
No editor ever questioned what I wrote, but I assume that's the World Book way. They pick an expert and trust that the expert won't abuse the privilege.
I have not bought the latest set of World Books. In fact, having been selected to be an author in the World Book, I now believe that Wikipedia is a perfectly fine source for your information, because I know what the quality control is for real encyclopedias. But sometimes when I'm in a library with the kids, I still can't resist looking under "V" ("Virtual Reality" by yours truly) and letting them have a look. Their dad made it.