Three labs crossed the fault-tolerance threshold in the first quarter of 2026. IBM Heron R3, Google's Willow successor, and AWS Ocelot all demonstrated logical qubits with error rates below the surface-code threshold — a milestone the field has been chasing for fifteen years.
That is not 'quantum supremacy in production.' It is the technical precondition for everything the field has promised. Useful quantum algorithms — Shor's, Grover's, the chemistry simulations that motivate the entire field — require thousands of logical qubits, and the prototypes are at single digits. The road from here to Shor-breaking RSA is still measured in years, not months.
But the cryptographic timeline just compressed. NIST's post-quantum standards (ML-KEM and ML-DSA) are now non-optional for anything you're shipping that needs to be secure past 2030. The 'harvest now, decrypt later' attack surface is real: encrypted traffic captured today can be decrypted retroactively once Shor-capable machines exist.
The practical 2026 move is not to invest in quantum applications. It's to migrate your TLS, your VPN, and your code-signing chain to post-quantum primitives. That work has a deadline that does not depend on your roadmap.
We're tracking the quantum advantage roadmap for chemistry and optimisation workloads on behalf of two clients. The honest answer for nearly every other industry is: not yet. Read the papers, attend the conferences, but build the post-quantum migration plan first.
