Quantum computing may possibly break current crypto systems so an attacker can read encrypted files/messages. If is also allows reversing current hash functions, this would allow a hacker with a stolen (hashed) password file to easily recover passwords from it.
The effectiveness of two (or more) factor authentication would not be altered, except to the effect that quantum computing weakens the crypto behind one or more of the factors.
The problem with using biometrics for authentication is that if it is possible for an attacker to 'steal' your biometric information, there is no way for you to change it afterward. When your credit card is compromised you get a new credit card number. When your password is stolen you change your password. When your facial information is stolen, I suppose you could perform plastic surgery, but that would be sort of extreme.
I think the future of authentication lies in smart devices that act like keys; you have to have them with you to authenticate, and they need to be stolen to get access to your account(s).