I think that you have two factors here. GDC isn't specific to PC gaming, and additionally, a lot of titles will see both PC and console releases.

For a game that is intended to see only a PC release, my guess is that that that might affect system requirements of the game.

For games that see console releases, things like "will fewer people have consoles"

because current-gen consoles are very unlikely to change spec, just price, is how this manifests itself. "Is the Playstation 6 going to be postponed" is a big deal if you were going to release a game for that hardware.