He was interesting character partially because he believed in God. This is actually quite rare at the very upper echelons of the scientific community.
I think that everything is the light with different levels form of concentration. High concentration of the light transforms to physics matter. Low level of the light is vacuum, high is atomic energy, Large Hadron Collider for example. The light is universal transmitter & transformer. The light is concentrated knowledge that is transmitted from the sun to every particle of the planet and peoples, and thanks to the light, matter and a variety of life forms are created, which creates a variety of forms of matter. The idea of Christianity about the resurrection of people is magnificent, then such great people as Dyson could be resurrected, why not? But technologies are needed in new physics and medicine, which would gain access to reality at the nanoparticle level. A 3D printer that prints the light and lays knowledge into the light to recreate a person. There is a pattern that the more we get access at the micro level, the more powerful chips we can build, and more powerful chips can calculate more hashes and allow us to bring in new gigantic machines, like telescopes and spaceships, which will give access to new macro-knowledge such as dark matter and black holes of matter-time consensus, which will allow us to create new petabyte flash drives based on light, and new the light based computers will be able to burn information directly to the points of space, and what it means to materialize any object, which will provide access to new knowledge and made new grand chips & telescopes. We already partially use the light in our rooms, networks and cameras and monitors to exchange information. New theories and machines based on the light will allow creating new machines for controlling the space-time continent and copying knowledge from any space-time, and then the task of resurrecting people becomes feasible and we can transfer the consciousness of this particular person from the past without distortion. If this happens in the next 5,000 years, then Dyson saw it right. To create such machines, we need new geniuses with Dyson's light. I'm sure we are know less about physics & light, because we live on single planet in single point of universe and our theories can be expanded when we arrive to new points of universe.