Sorry, this is a red herring, or a waste of time. At least for Catholics who believe in the soul.
You can't upload to "brains" like in the sci-fi movies because "who we are" and "our consciousness" is not just a brain with memories. There is a SOUL involved and there is no technology that can interface with the SOUL.
No, humans will never be able to "upload their consciousness" and live forever in a machine body. Impossible.
Human sentience can't be reduced to 1s and 0s. If it could, then YES, sentient AI would be possible at least someday. But it's not. Human sentience came about because God created us with an IMMATERIAL (and hence immortal) soul and hence the ability to abstract concepts from the physical world, to conceive immaterial ideas. Animals don't even have this, much less any computer or computer program.
Kurzweil is full of shite.