[DaveZale]

there seems to be a there, there.

So if quantum computing is expected to be that powerful, what will happen to the trillions pouring into old-tech data centers?

Anyone else get the feeling that something doesn't add up here? Just what nonpublic evidence is behind these decisions to ban the new tech?

[bigyabai]

> what will happen to the trillions pouring into old-tech data centers?

Quantum compute is not a silver bullet and requires lots of auxiliary hardware. If it takes off, trillions will still be invested in classical computing.

[adrian_b]

Yes, the term "quantum computer" is rather misleading for most people, who do not know what a "quantum computer" is.

Quantum computers are not general-purpose computers, but special-purpose computers, which are able to outperform traditional computers (with a much greater cost) only for the solution of a small set of problems, most of which have little relevance in the applications where computers are currently used by the majority of people.

A quantum computer would be completely useless for reading and editing documents, computing spreadsheets, managing a database, browsing Internet, watching movies or playing games.

Thus it is very unlikely that anyone would ever desire to have a "personal" quantum computer (otherwise than for a learning experience), even if that would become possible with respect to cost. The same is true for most businesses, which are unlikely to have any needs satisfiable by quantum computers.

Quantum computers will never be competitors for traditional computers, but they could allow a few new applications, for which traditional computers are not good enough. One such promising application is the simulation of quantum systems in a manner similar to how analog computers had been used until 3 quarters of a century ago for the simulation of dynamical systems.