[matheusmoreira]

Google SafetyNet can be used to attest that the device has not been modified or "tampered" with. Basically Google cryptographically proves it owns your phone and has control over what you do with it. You can fake the software attestation right now with stuff like Magisk but once it moves to hardware attestation it's over. You'll be able to install custom systems but what's the point if they can't run the apps you want or need?

Why wouldn't an app require this? Banks want it because "fraud", streaming services want it because "piracy"... You can come up with pretty much any reason for any "rightsholders" to want control over our computers. If WhatsApp starts requiring this, it's either accept Google control or my phone turns into a paperweight.