I don't think immortality is possible even with the highest possible technology that we can create. Unless we mixed our body with robot features, that's when immortality is possible. And the intelligence of human can be transferred to computer. That's why AI now are being studied and improved by developers.
Interesting you mentioned about the transference of human intelligence to a computer. For most people, it sounds like a plot for a scifi book or film, but in reality, its based on actual research. If youll look up the Virternity Project, youll discover how likely humans can have their consciousness digitized and uploaded into a virtual realm to achieve this coveted immortality. Have you heard or read about it?