I think there are several versions of the Start Menu UX depending on OS version, language/region, privacy and search settings etc. For example, Cortana is not available in Hungarian, so if I set my region to Hungary I get the radically different looking Cortana-less search UI. This didn’t even include web results until recently. But the reason the screenshot surprised me is that I haven’t ever encountered the embedded webview style Bing search results before.
The three column layout looks unintentional. Restarting explorer.exe removed the middle column again. This was some sort of glitch.