Over the last week I was read posts on forums and reddits from games developers, designers and artists said their PCs they worked on projects of very high resolution assets, models and textures used 64GB RAM told everyone 32GB RAM will not be enough soon when next generation Unreal Engine 5 and other engines games will ship. In the next few years they will upgrade from 64GB to 128GB RAM to work on much massive assets, models and textures when 64GB will not be enough to handle it. All these massive 128GB RAM assets, models and textures will be use in future games projects for Playstation 6 console, RTX 6000 series GPUs etc in 2026. Next generation flagship RDNA3 GPU will have massive 32GB VRAM instead of 16GB VRAM and RTX 4080 will have massive 20GB VRAM instead of 10/12GB VRAM. Playstation 5 Pro expected to launch in 2023 will likely to have VRAM doubled to 32GB.
I dont know where your idea of another 3-4 years came from but that is far too long to wait. Unreal Engine 5 was launched just last week when it left beta, we will see some Unreal Engine 5 games launch in 2022 like Ark II, Redfall and probably The Callisto Protocol. S.T.A.L.K.E.R. 2: Heart of Chornobyl was scheduled to launched this month in April 2022 but it was delayed to 8 December 2022 due to war in Ukraine. I remembered played the first Unreal Engine 4 game Daylight after when Unreal Engine 4 was launched back in 2014.
Games developers probably have over 100 Unreal Engine 5 games in developments right now. About 25 Unreal Engine 5 games announced will ship in the next few years. Cant wait to play Unreal Engine 5 games like Tomb Raider, The Witcher,
Vigilance 2099, Wronged Us, Project RYU, Shadow of Conspiracy: Section 2, Rooted, ILL, Hell Is Us, The Callisto Protocol, S.T.A.L.K.E.R. 2: Heart of Chornobyl etc.
https://en.wikipedia.org/wiki/List_of_Unreal_Engine_games#Unreal_Engine_5