While there's no mention of the RTX 4000 series specifically, it's hard to imagine that a tweet for something called ProjectBeyond is for anything other than Lovelace. The post comes from the Nvidia GeForce account, so it's obviously gaming-related and not part of Nvidia's other businesses, such as AI, datacenters,...
https://www.techspot.com/news/95906-nvidia-teases-projectbeyond-which-almost-certainly-rtx-4000.html?utm_source=dlvr.it&utm_medium=blogger
https://www.techspot.com/news/95906-nvidia-teases-projectbeyond-which-almost-certainly-rtx-4000.html?utm_source=dlvr.it&utm_medium=blogger