I agree with NinjaGoose - King George V and his wife Queen Mary had a child, Prince John who had epilepsy and also what would probably have been diagnosed now as autism. He died in 1919 at the age of 13 but spent his life hidden away. Very sad story.
I can't see that it made a jot of difference, he was virtually erased from history until Stephen Poliakoff wrote a play about him.
I think that one of the reasons that I dislike Cameron SO intensely is due to the fact that he used his disabled son for political purposes and has then proceeded to sh1t on the disabled and their families from a great height.
But its OK as "we're all in this together!"
bochead and Appropriatelytrained are right - A-list celebrities and the royal family live in a parallel universe compared to us common folk, with money, privilege, influence and power and the ability to buy in expertise and therapies that the rest of us can only dream of.
I can't see them being repeatedly forced to go to Tribunal for educational support or for DLA.
It is the constant fighting for support that wears parents down, more than living with the disability itself.
The recession seems to have hardened peoples attitudes against disabled people - just take a look at the AIBU threads.
So no, I don't believe that it would advance the cause of disabled children and their families at all. Not in the slightest.