Computation isn't hidden in a parallel program, either. But if you only count the running time, and not the total instructions retired or the computer's energy usage, you're not getting the full picture.
And there isn’t parallel computation going on either. I think there’s a fundamental misunderstanding of how quantum compute works here. There is no merge-reduce as another commenter is claiming. Even in MWI, the decoherence is one-way.
