Human-animal genetic hybrids, no Beasty.

How are we coming along in the human-animal hybrid area? I'm not talking half-human half-animal, furries, or anything like that.
Let's just say someone doesn't like the shape of human teeth, but loves, say shark teeth. He gets the genetic change, and the only thing that changes is his teeth, which simply re-grown as jagged and shark-like.
Or, another example, someone dislikes the feel of human skin, so they get snake or lizard alterations, so that they have more of a scale texture.
I'm sure I'm not the only person who's thought of this, since it was in an episode of Batman Beyond (I just now remembered) and the Beastmen from Gurren Lagann came awfully close to the idea.

It would likely take us to the Age of Immortality, before we get this kind of science going, but is there any news on it? Also, discuss what animal you'd like to have an alteration of.
As said above, I'd love the shark teeth, and I've love some cat's eyes.

inb4 stolen ideas, God's rage, and "gtfo Skurai".