Not convinced. They will need to artificially force GPU shortage to create the same shortages we've seen from the previous problem that was mixture of issues and not just one, which will only cost them sales in the long run if AMD pump out higher supplies, also consoles will eat into Nvidia sales too. And i'm sure Nvidia are well aware of Intel wanting to jump into the market at some point. At the top end ~3090, sure Nvidia will probably opt for higher price, but it's the flagship and we saw that with the 2080ti.
Looking at recent Steam survey, there's growth in APU users, so i'm going to presume these are people who are waiting. Declines in 1060 and rx580, these are people who have now upgraded, but they won't upgrade at the next gen. I imagine those on low end have bought from the second hand market. We can see stock is readily available now for newest gen also. However this is all speculative based off stock and steam survey, so others will derive other opinions from that.