London is a brand before it’s a city. It sells to an international audience that has never been there, and anything pairing that name with a modern prefix inherits some of that reach. Meta is the right prefix because it outlasts the technology it’s currently associated with. The virtual worlds reading is real enough: a digital London, a mirror-world project, a VR venue, an immersive studio working with the city. But meta has been a productive prefix in English for far longer than any platform, and meta-London also reads as London about London.