With the entry-level and lower-mid-range RTX 3000 GPUs already in production, we could expect a complete Amepre lineup by late 2020. This way, Nvidia can better counter AMD's RDNA2 GPUs that threaten to take over the gaming GPU market in Q3 this year.
https://www.notebookcheck.net/Nvidia-s-GeForce-RTX-3060-and-RTX-3050-Ampere-GPUs-rumored-to-already-be-in-production.480835.0.html