The document discusses the Tin Can API and how it is rethinking learning systems by moving to a new LRS-centric architecture. It proposes 4 layers: 1) fixing SCORM, 2) allowing any learning to be tracked by LMSes, 3) introducing a new class of LRS software, and 4) enabling correlation across systems. This new architecture shifts the focus to learning record stores and allows learning to be tracked across different systems and experiences.