Also used in the UK to create virtual TV studios, notably for sports programmes where the pundits sit in a green-screen studio and impressive real-time backdrops are created around them. This allows a single physical studio to support multiple programmes using a range of different virtual assets. See [0] for a range of the different things Unreal is used for apart from games.
[0] https://www.unrealengine.com/en-US/events/build-for-architec...