The super secret conference room is a maybe. Factories though? If you’re going to be wiring up factory machines, you can easily just add one more cable for ethernet and it’d probably be cheaper and just as secure. We’d have to be talking about machines/devices that are in a large warehouse-like space and frequently moved around (thus requiring wireless networking) and that require either the security or bandwidth benefits of Li-Fi (most don’t). That limits the applications significantly.