The Eglin limit that's most visible is a 7 story limit on Okaloosa Island. Drive down Santa Rosa Blvd, and almost all the buildings on the Gulf side are exactly at the Eglin height cap in a nice even line.
There was talk with the proposed Turnberry development of something like a 36 story luxury tower near Destin Commons mall. But Legendary ended up pulling the project after Eglin complained it would interfere with radar testing. Legendary's a local comapny, and you just don't try to go against the DoD in a county where 60% of the local economy ties back into the bases, especially when there's a BRAC round on the horizon. Without Eglin's R&D programs and the white collar jobs they bring to the area, Ft. Walton Beach would be as much of a dump as Panama City.
It's funny to watch these days how the environmentalists and slow growth proponents have learned not only how to partner with the bases on conservation efforts, but to play the base encroachment card against the developers in some cases.