[higherpurpose]

3D models have been created out of 2D images before. I'm not saying this will be hackable from day one, but it will probably take a few short years for a well sponsored and motivated attacker. Hopefully the technology will also keep up and within a year or two we'll see updated versions that make it even harder to replicate.

However, if I were to pick, I'd go for fingerprint recognition instead. Images of people's faces are everywhere online. It's much less likely to have a good photo of your fingerprints.