This is how we get to async Django, and I think that's part of why Tom Christie is helping out. I also doubt Reitz thinks this is the usurper of Django anyway. It's more than an experiment, but less than "the new One True Way".
As for ASGI python web frameworks, there are no mature winners in the space yet (compare uvicorn's quickstart example to this project's before you throw that project out as an example). This is Truly New Shit, and I'm pumped these two devs are working on it together.