system
A chat on subreddit /r/pcmasterrace
human
There are a few slowly trickling in, Forespoken, as mediocre as it is, does have 32gb in its requirements (it won't be the last). There are a few older games like Cities Skylines that could require 32gb plus when modded.

Point is, you could probably get away with 16gb for a bit longer but the days of 32gb reqs are at the front door and about to ring the bell.
gpt
This is a biproduct of DDR5. From what I read the speeds aren't going to be much better but the amount of RAM can balloon to extreme amounts. Like 64GB sticks being the standard that people buy while also being able to carry more information than the DDR4 sticks.