SpaceAnteater

Cool. Thanks for the reply. I think maybe we can define "widespread use" as "broadly accessible to the public, and able to perform useful tasks", so based on your answer it sounds like this is possibly achievable within 50 years.

Back in 1998 I made a bet with someone that quantum computing would be in widespread use within 10 years. I lost that bet badly. Given the state of quantum computing now, if I were to make a similar bet now, when should I bet on widespread use of quantum computers? 5 years from now? 20 years from now? 50 years from now? maybe never? Would a quantum computation algorithm help in selecting the correct timeframe? :)