the most important question is still: what makes someone better looking and what should be done to make that person better looking? A surgeon should be able to make a face better looking based on a good morph, but these cases are rare. I think the next step will be designing computer programs that are able to predict the changes in all directions with soft tissue attached to the face, instead of based on a skull. The latter gives too unpredictable results, you need to see the changes with soft tissue on face.
There is such a convergence of technology happening, trying to predict what we'll end up with is impossible.
If we just looked at the potential of regenerative technology alone for instance, we could end up a total solution. A body already knows (hypothetically) how to build 'perfectly' formed pieces of itself. Salamanders (and I think most/many amphibians - especially the axolotl) can have its tail cut off and attached to an amputated arm and this tail section will grow into a perfect arm (The axolotl can regenerate almost all parts of its body from scratch). It's not clear how this would or if it could work in an adult human, but it's possible we have genes that are just 'disabled' (regeneration would be incredibly resource intensive for a large animal like a human in nature). With this approach, you're just harnessing the already incredible built-in regenerative process in organisms.
Why does someone look good? It's just a combination of health (lack of genetic disease) and the right chemical balance (which the 'ideal' is probably just a moving target based on all kinds of cultural values). I'm heavily simplifying it here as it all has a genetic basis and a tangled web, as well as individual and more superficial traits for hair color, etc, etc.
If that doesn't work, we always have nanobots and ai assisted surgery, consciousness uploading (transhumanism), minds controlling surrogate bodies, etc. Yep, I think I'm finally losing it...