Although I can appreciate the talent required to produce a piece of work such as this, I don't think that this best captures Kate as she is now.
When I look at the picture (the picture below can be expanded to a larger size) it feels like the artist has looked forward to her as she approaches her forties.
The cheeks, chin and mouth area don't feel quite right. Below her eyes adds to the impression of someone getting older. I also feel that the hair displays hints of grey.
Listening to the news reports, the royals are all saying how wonderful it is, but I would not be surprised if in private they are not a bit more critical.
What do you, the other forum'ers think?