I don't think speed dating is going to replace apps. I did some dating pre-app, it wasn't big then. Its unnatural, and doesn't appeal to many personalities.

I'm one of the men apps don't work for, easy to see why we hate them. For women, I think they say they don't like apps, but they do like the fact they get an endless stream of potentially date-able men from them. So their revealed preference is they like the apps, and that is why the apps continue to be relevant.