I think we will see the BWB built.
Guess who's interested: the USAF's Air Mobility Command, FedEx, UPS, DHL, Northwest Cargo, Lufthansa Cargo, Singapore Airlines Cargo, Cathay Pacific Cargo, CargoLux, and Atlas Air. The reason is simple: Boeing has shown a BWB-based cargo carrier with roll-on/roll-off ramps, and the cargo area is big enough to carry both outsized cargo and generally more cargo than the A380-800F at lower fuel costs.
People forget that the BWB actually has less
of a ground parking footprint than a 747-200F!