According to a report by DigiTimes, factories in Taiwan are already ramping up to help NVIDIA bring out its RTX 4000 series gaming GPUs in 2022, based on 5nm lithography. Notably, the report indicates that "Hopper," rather than being a new GPU generation, will be an MCM architecture for datacenter and HPC use cases.
https://www.notebookcheck.net/DigiTimes-report-outs-a-2022-timeline-for-5nm-Lovelace-based-NVIDIA-GeForce-RTX-4090-and-4080-highlights-that-Hopper-will-be-pulling-AI-datacenter-duty-instead.582114.0.html