You don't have to imagine. I gave a clear example: DAU statistics for a VR browser. Or you could look at basically any successful technology, look at it on the way up, and ask what the early signs were that it was seeing significant use beyond novelty purchase. (That is in Moore's model getting out of the "innovator/techie" market segment and into pragmatic use.)

For literally my entire adult life people have been talking about VR as the coming big thing. I'm 100% over hearing about that, especially in response to very specific questions about actual use.