Douhet wasn't totally off, he just didn't take into account that aggressors are almost always greedy and defenders quite often stubborn. Plus almost nobody dared to open Pandora's Box (C weapons) again after WWI.
We came close in the heady early days of the nuclear era with the idea that nuclear weapons would make conventional war obsolete. The "potential" of modern airpower for some is to achieve this goal through "acceptable conventional means". Unfortunately making existential threats to bend others to one's will is a difficult thing to justify. There is more to war than the Halt scenario...