Most PC gamers will be fine to play at 1440p for years to come. Some even with 1080p.
That gives already a lot of room to play next gen games on PCs they already own.
That's already a big difference to this generation where half (or even a quarter) of a 1080p PS4 game was just unacceptable for many.
The difference with higher resolution isn't that crazy anymore for many and 1440p is totally fine for most.
There will be obviously gamers who have to upgrade and most will upgrade in the next 5 years or so but that is just normal for PC gamers and nothing which needs a thread as information for.