I am pretty sure anyone will still be able to install a distro/fork from a free country, but steam is unlikely to go this route because convenience is part of the package. They may not even care to resist because they already ask your age for the steam store.

I am more curious what this will do for non standard devices with multiple users. Even kitchen equipment may run a derivative of linux these days and they don't come with keyboard access.

You're probably writing that on a device that has a secure boot chain. So far it was there without strict enforcement, but once the manufacturers decide you only get your shit signed if you implement $ARBITRARY_ORWELLIAN_GOV_RULE, you're pretty much fucked.

If it doesn't generate a token you won't be able to access the site.