It would be even more exciting if the device doesn't work for large number of qubits. Several theories (e.g. by 't Hoft, by Smolin) predict that quantum computers should not work when amplitudes become small enough.
Stephen Wolfram has an interesting blog post which is somewhat related https://blog.stephenwolfram.com/2015/12/what-is-spacetime-re...
't Hoofts book about celular automata interpretation is free at https://www.springer.com/gp/book/9783319412849
There are several theories predicting collapse of wavefunction which would prevent quantum computers e.g. https://en.wikipedia.org/wiki/Penrose_interpretation