Nobody has claimed yet having anything that is a scalable error-corrected quantum computer (or whoever has claimed it was never taken seriously). But we are wor

Nobody has claimed yet having anything that is a scalable error-corrected quantum computer (or whoever has claimed it was never taken seriously). But we are working hard on getting there, and this 53-qubit "quantum computer" is indeed a machine that can compute things and it uses quantum effects (so it is a "quantum computer"). It is not a "general" or "error corrected" or "scalable" quantum computer. The comparison in sibling comments is very apt: this, and other research hardwares of today, relates to general "useful" quantum computers the way a bunch of vacuum tubes relate to the first classical CPU.