There is the business & the hobby.
2008 almost killed Stern, but the hobby was fine. Used games from dead manufacturers kept going up in price.
This will definitely affect the pinball companies. Barcades & public places are closing & rich people are losing a lot of money which will affect home games sales.
As far as the secondary market goes - I think once again, generally, it will be fine. The collectors who bought classics at low prices years ago won’t be motivated to liquidate. What might be different are the NIBNEWBS of the last 5 years. To them, collecting has been a massively different experience than it used to be - it’s only ultra expensive new games. I wouldn’t be surprised if you see some fire sales & value drops of SPIKE Stern games. I don’t see the market changing for games of previous eras.