The games market is actually getting worse at generating PC sales.
We have the mass defection of casual gamers to phones and tablets completely removing the need for any sort of competent PC/laptop for many.
At the same time there's been an explosion of game download services fighting for customers. Unlike store shelves they can afford to keep older games 'in stock'. It's become trivially easy to find 2,5 or even 10 year old games worth playing, at ludicrously low prices. Literally thousands of games to choose from, more games than anyone has time to play. I have something like 20 AAA titles from the last 5 years I didn't have time to play at release, all waiting to be played.
Unless you're chasing brand new AAA titles no-one needs a new gaming PC. And of course the AAA chasers all moved to console 5 years ago anyway!