Unless they pull out something really cool and revolutionary this is probably just a fax machine.
Outside of the corporate world email is almost a legacy protocol. Like phone numbers we have one because we need to but do not really use it that much anymore.
I believe email was de facto replaced by WhatsApp, iMessage, Social media and OpenID almost 20 years ago.
Just ask a gen Z or Alpha when was the last time he sent an email.
Now they are gonna try to ride the wave of the Big bad tech escape but Proton has a 10 years lead here.
Email is used everywhere from account management, subscription services, school, and generally every single employer or client I've ever worked with. Sometimes I work with clients through SMS, Signal or Discord but we still fall back to email for certain things.
OpenID certainly hasn't replaced email. Young people still all need email to sign up for ~anything online - not to mention things like job/school applications or plenty of other real-world things.
What email has become is an identifier and a receptacle for notices. It's not a social platform for young people. But it's very much a thing!