The thing is that you don't know if it eventually will be implemented. What if saylor collaborates after a year and proposes to include biometrics?
Discussion
I suspect that there will be a biometric option. This proposal looks like it is intended to be a basic version that is extensible, and different companies will use whatever versions they prefer. Governments are our biggest threat, because they are the only entities that can force compliance to a particular standard on a massive cohort of people.