It isn't really your place to decide what is acceptable security for users :-) The touchstrip used in my laptop is certainly way better than the finger sized static readers like those from Microsoft. Fingerprint authentication is also better than weak passwords, eg people using one of the twenty most common passwords. Pretty much any scheme can be broken (eg use a gun and coercion). And an encrypted home directory plus fingerprint is better than unencrypted and fingerprint.
Making this all work when a password isn't entered is hard, but it is solving the hard problems that distinguishes good software.