A few things.
One is that steam frequently has actually cheap games more readily than the console digital stores.
Another is that if I'm buying a digital entitlement anyway, I'll go with the ecosystem with the greatest track record for long term compatibility. A game purchased 20 years ago on steam is still generally playable in brand new system. A PlayStation game purchased then is not playable on a new Sony system. It is in fact only playable on PC through emulation, so PCs have been covering for console incompatibly.
Once upon a time, consoles brought some unique values. Easy to plug into TVs, consistent gamepad experience, and just turn on and play.
Nowadays PC operating systems and console operating systems act the same, tv output is just HDMI, gaming controllers are well supported on PCs... The last reason to bother with the console gaming was the physical media. So while sure, they can go digital only, but then why bother with a console at all? They've already lost every other advantage.

You expect me to believe the aliens on P7X-377 care at all about the World Cup?