That now leaves the Sahara, Tropicana, Circus, Frontier (maybe next to go), Riviera, the Flamingo and Caesars as the only Strip properties left with any 'history'!
The Sahara, Riviera, Tropicana and Frontier are already on shakey ground and Circus may go if Mandalay is absorbed by another bigger operator. Only the Flamingo and Caesars may be left on the Strip in another 5 years or so.