You all are taking this one argument out of context. He wasn't talking about restaurants. But everyone here is.
Obviously restaurants should be personalized. But no one was saying they shouldn't.
You have to take the argument in the essay and try to think of the most persuasive possible interpretation. Is that "If I search for something in Seattle, it would be stupid to return results in Chicago"? Probably not.
My webdev friend was excited that her personal site was being returned in her search results whenever someone searched a project she had worked on. I suggested that google was serving her personalized results. She searched in incognito. Her site was still being returned. Pretty good, right? She was getting exposure.
When we used a VPN, she was not in the results. Google knew that our searches came from our IP address, and that searches from our IP should include her site, since she mostly visited her site from our IP. Or something along those lines. Either way, it was a misleading worldview.
I'm going to be harsh for a second, but I mean this lovingly: Stop being naive. It's important for us to be skeptical of Google. They're the thousand-pound gorilla, and the moment they do more than wink and nod at their "Don't be evil" philosophy then we should start getting scared.