A zetetique read on quantum computing in 2026: real error-correction milestones, the one deadline that is real now, and a manager's hype filter.
Quantum computing in 2026 is real science wrapped in unusually bad marketing. The physics is advancing on a schedule that would satisfy any serious lab, and the press releases are running about a decade ahead of it. If you make budget or risk decisions, your job is to separate the two, and it is easier than it looks once you know which numbers to trust.
Here is the short version. Error correction crossed a genuine threshold in the last two years, which is the milestone that actually matters. No quantum computer has done anything commercially useful, and none will for years. And there is exactly one quantum deadline that already applies to your organisation, and it has nothing to do with buying a quantum computer: it is migrating your cryptography before someone with a future one reads the traffic they are recording today.