Again, it's a little surprising to me that they would serve so much French wine at the State Dinner. I would have gone for a mix of Australian, Canadian, New Zealand, and South African wines.
It's a minor point, but it sends a message to the Commonwealth countries. What the royals drink in private is their own business, but at a State Dinner, you should be exhibiting foods and drink from your own country, or if you can't, from close allies. In this case, the Commonwealth.
I seem to recall that the U.S. has been doing this for a long time - serving American sparklers, whites, reds and dessert wines at U.S. State Dinners.