[j1vms]

> But comparing it to manned flight or the first nuclear reactor (...) this experiment changes very little as to how probable it is that we will soon have useful quantum computers, or even that we will ever have them.

Not a lot of people directly own & operate their own airplane, let alone a nuclear reactor, and yet both have had a significant impact on modern life. As for this experiment & QC, only time will tell of course.

[sanxiyn]

I think you misinterpreted "we will ever have them" part. bjornsing is not talking about whether there will be personal quantum computers. It is about whether there will be useful quantum computers at all. That is still open, for example because of issues related to quantum error correction.