Rabbit, a startup once anchored to a dedicated AI hardware device called the R1, has quietly reoriented itself around something more durable: software. With the launch of OS3, an agentic operating system designed to run across the devices people already own, the company is wagering that the future of AI assistance belongs not to any particular gadget, but to the intelligent layer that moves between them. It is a familiar arc in technology — the hardware as prologue, the platform as the real story.