The writing is certainly on the wall for Duxford as a major airshow venue and I presume its all over for Shoreham anyway.
The CAA's reaction is predictable. They have much bigger fish to fry than being embarrassed by a tragedy at an airshow. The increase in their charges announced soon after the accident has nothing to do with improving safety but from their point of view is a simple way of removing lots of the problem; a massive hike in charges will simply kill off lots of the smaller shows.
This won't change. As has been pointed out, this is an opportunity for lots of the "anti's" to get their way. The airshow industry will have to adapt to whatever is thrown at them or simply stop.
I must admit, I have been slightly surprised at some of the information that has come out post - Shoreham, about how air display routines are authorized and how display pilots flying them are checked out. I do feel sorry for Andy Hill and I mean that without irony but I was surprised at the number of hours - or lack of them - that he had on type and the fact that his authority to display seems to have been issued by a member of his own aerobatic display team. This can - and I've no doubt will - be construed as a conflict of interest.