I can think of a couple of airfields that have the space and have a decent runway length, Prestwick and Manston. I think Farnborough has changed for a long time to come.
I think you're spot on there KPax. Farnborough's atmosphere will change forever, should these requirements remain.
I can only see pressure mounting to host elsewhere; somewhere more open/rural compared to Camberley and its surrounds.
Perhaps Fairford could become a single, 2-week event with a week and a half devoted to Business/Commercial, then the usual long weekend for RIAT.