Sony will happily shoot themselves in the face rather than give in to their customer's desires.

Microsoft will try and force their customers into something they don't want, because it's obviously better for Microsoft than their customers. They may succeed - success being "not completely losing all of their market share".

Nintendo will figure it out somehow, even if it means pivoting out of gaming altogether. Chances are - they will choose to make their customers happy instead of shooting themselves in the face. But they will try to shoot in the face youtubers and modders who make their customers happy.

On balance, Sony will most likely shoot themselves in the face, and survive to take whatever market share Microsoft gives up. Somehow.

Don't forget PC gaming. Steam will keep growing, without even having to try that hard, simply because they:

1. already have their foot in the door

2. are not overwhelmingly hostile towards their customers