Hey there, depending on the plan, you get access to unlimited vaults and hide-my-email addresses, Proton Sentinel (account takeover protection), ability to enforce 2FA, and built-in 2FA authenticator. More features such as SSO and groups coming soon!
So once again it is basically a premature announcement; since all of those features already available, already exists in the ordinary Proton Business plan ... As none of them are basically Pass specific.
And the difference then between "ordinary" Pass and business "Pass" is zero .... Both have unlimited vaults and 2FA in the more costly plans.