alt Hacker NewsQuite true. Regrowing teeth should not be too hard though - after all the information for growing teeth already is in most humans. One just needs the correct transcriptional activations again. I am sure this will be solved eventually; as for how long that will take ... who knows.
The odd thing is in Humans is that if we loose our teeth the jawbone itself also starts to recede. Part of the process of installing an implant is doing either a matrix or a cadaver bone graft in order to overcome this.
We are, in some sense, meant to accept the loss of our teeth, likely because it impacts lifetime energy efficiency in some way that we're not correctly observing yet.