Well, as much as cold fusion became synonymous with bad science. I think fusion at the nano scale is more promising than the designs that try and recreate conditions on a star. Stars are incredibly slow at burning their fuel. So sustaining the heat and pressure without all the mass will always be hard to sustain efficiently.

Using charged plasma to accelerate air and supercavitation would allow airships to be nearly frictionless. So, glowing craft seems very likely to me.

The microwave thing, not sure. Right angle interference pattern that causes a motive force as a side effect? I could see that but it wouldn’t be super fast— ultrasonics might work in air, but, probably not with a lot of thrust.