Where does the notion of Heaven and Hell fit into this idea, where there is no living brain nor sensory apparatus?
We will have heavenly bodies.
After the resurrection, there are some indications that the resurrected body of Jesus was different from His earthly body. In John 20:17 Jesus tells Mary and her companion:
17 “Do not hold on to me,” Jesus told her, “because I have not yet gone back up to the Father. Indicating that His resurrected body was not yet ready for embracing.
And there are several passages where the resurrected Jesus is not at first recognised by the disciples.