As a stutterer, I hate the idea (Score 1)

The subject pretty much expresses my opinion. Many stutterers, including myself, seldom stutter during normal speech. But place us in any sort of stressful situation (eg. speech on demand), and I'll be darned if the stuttering doesn't start up.

Classic situations - responding to a business phone call isn't a problem. Initiating a phone call to a business sucks.

I fear that voice fingerprinting, where one has to verify one's identity in a time-limited manner is going to be hell for us.

I'm sure the 1% of humans who stutter (to whatever degree) would prefer retinal scans!!