Indeed. From the discussion section of their paper: "This shows that quantum correlations can be universally recreated with classical systems at the expense of

Indeed. From the discussion section of their paper: "This shows that quantum correlations can be universally recreated with classical systems at the expense of some extra resources" (Emphasis added) I might be wrong, but judging from Fig. 1 in the paper, it seems these "extra resources" involved are exponential, which is exactly what we would expect since we already know arbitrary quantum circuits can be simulated classically with exponential slowdown! But I guess the setup is interesting in of itself --from an experimentalist point of view at least.