According to Aaronson and others, the D-Wave architecture has not demonstrated any behavior that can't be explained using classical physics, so just making the device bigger shouldn't change it into a quantum device with a quantum speed up. That said -- who knows, maybe the architecture is different enough from everything else that it could be a better classical annealer than standard processors (though it's only ~1000 bits, so it probably can't outperform any conventional processor sold today with billions of bits).