This is a clever example of one of the millions of things you could use wave for... And they didn't even get very far into the good part - Ideally, Wave D&D would have a robot extension which the DM could use to roll the die, calculate scores, etc.

I could see wave spawning a whole genre of multiplayer, wave-moderated games which take advantage of the ability to move seamlessly between synchronous and asynchronous player communication.

Another example where this could be applied: live fantasy football drafts.