Justin Drake mentioned this (again) on a recent episode of Bankless.

@BoltonBailey Er, I don't think David is right though about "this is a sure thing we know that it works we know that it works this way now we just have to build it".

@BoltonBailey Also, I think that OSS would technically not cause this to resolve yes, because the signatures themselves are classical. A primitive that would make this resolve yes would be something like Quantum tokens for MAC which would use quantum communication but would not need fault tolerance and would therefore be much more realizable. (Also we actually have a construction in theory).