The bank id is not a physical card. Rather, it's an app that provides 2FA and which is backed by the major Swedish banks. It is the de facto standard for electronic identification in Sweden. Originally, it was mostly a desktop application that helped you log on to your internet bank, but it has increasingly become a way to log onto web sites - anything from e-commerce to government agencies - while proving your identity.

I wonder what will the non-banked people do in the future? Their life is in many cases miserable enough as it is, not being able to purchase basic groceries because you don't have a credit/debit card is next-level capitalist dystopia.

A lot of Sweden is already like this. They're a super cashless society currently. I have only lived in Stockholm, but a large number of places will not accept cash in any form. This is done for security and convenience reasons, and most Swedes from what I have seen seem to prefer and like this method. It definitely has implications of course... but none that seem to be bothering the masses.

Here's some info about it: https://sweden.se/business/cashless-society

In some countries, and I wouldn't be surprised if Sweden is one of them, it's a requirement that you be allowed to have a bank account. You can't be refused.

That’s very good to hear, from where I’m from (Eastern Europe) a bank account is very heavily linked to a current physical address (as in, you must have a physical address officially attached to your name which in itself is a quite cumbersome process) and oftentimes with an additional proof (like an utilities bill on your name attached to that address). That makes getting a bank account a little difficult for many people.

I haven't used the stores themselves but they reference using BankId which is an national identification app on your phone you link to your bank account that also requires a pin code.