The redefinition of the International System of Units (SI) has resulted in a modern, robust SI that enables open-access, zero-length traceability chains, and the ability to democratize metrology. The SI units are now defined by fixed values of fundamental constants or properties of Nature and hence we have truly realized the original goals of the founders of the metric system and the Meter Convention. But continuing progress is leading to a new era. This lecture provides a preview of some coming advances in metrology and describes paths to making available world-class metrology on manufacturing floors and in consumer technology. The redefined SI, in the 21st Century and beyond, will also make possible improved tests of the Standard Model of Particle Physics (Standard Model).
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