A new field in communication is arising in the form of quantum communication. I don't know much about it but at this point the focus seems to be on cryptography. However if we can use quantum entanglement in communication it seems to me that eventually we will be able to send communication or transmissions over any distance instantaneously. This would make the speed of light limit irrelevant.

So if this is the case, and we advance VR technology to the point where we can experience an environment remotely via a robotic explorer with instantaneous transmission, what would be the purpose of humans actually leaving? What would be the financial incentive? Over population issues seem as if they could become moot as well, as we would all be residing within a digital network... perhaps one that eventually would span the galaxy? (crazy laugh)

https://www.picoquant.com/applications/category/quantum-optics/quantum-communication

https://en.wikipedia.org/wiki/Quantum_entanglement