for other lay people watching - the original paper was over hyped. There is an interpretation of quantum mechanics that basically thinks that the state of a quantum object is more or less sampled from an underlying reality that we cannot fully capture. This viewpoint is not widely held, even a lay person such as myself found it to not make much intuitive sense - it seemed like another way of sweeping hidden variables under a rug.
Anyways the paper now mathematically refutes this viewpoint. It still leaves untouched another probabilistic view point that the state represents no underlying reality and that quantum mechanics is an extension of bayesian probability theory to a complex space (this is the view I think makes the most sense).
In essence the paper simply solidly codifies what most of the physicists already accepted. So not much changed.
Anyways the paper now mathematically refutes this viewpoint. It still leaves untouched another probabilistic view point that the state represents no underlying reality and that quantum mechanics is an extension of bayesian probability theory to a complex space (this is the view I think makes the most sense).
In essence the paper simply solidly codifies what most of the physicists already accepted. So not much changed.