That seems unlikely to happen in the near to medium term. For that to happen, everything would have to be rewritten using a quantum algorithm and language, and

That seems unlikely to happen in the near to medium term. For that to happen, everything would have to be rewritten using a quantum algorithm and language, and run on quantum hardware. Imagine writing a web browser in a quantum language, within a quantum computing software ecosystem. It's hard to see how that would have any benefit. If you are talking 100 years out, though, who knows?