In your example, the "immortality" lies in the perception of other people.

Assuming the technology yields a perfect replica of your brain and everything to do with it, to your family and friends it's you that is in that computer or robot.

When you die, your loved ones go through the grieving process. When you interact with them, they have learned behaviour around you. Your significant other has brain chemicals flowing dependent on your presence. The number of details surrounding these people is immense.

So when they have access to this entity that is a copy of you, all of those details are carried over, minus the differences that may arise from the different body.

Your significant other's brain doesn't go through withdrawal from your absence. Your family still benefits from your presence. Your consciousness can still produce work, especially with a body to go with it. So your business/career continues without the biological copy, too.

So to the rest of the world, they have a copy of you that's not subject to things like cancer. They have access to something they can likely continue to copy as well.

So the immortality is more like the abstract immortality we attribute to things like legacy.

In your example, the "immortality" lies in the perception of other people.

Assuming the technology yields a perfect replica of your brain and everything to do with it, to your family and friends it's you that is in that computer or robot.

You have an influence on your environment:

• When you die, your loved ones go through the grieving process.
• When you interact with them, they have learned behaviour around you. You affect their decisions, their life, and even their personality.
• Your significant other has brain chemicals flowing dependent on your presence.
• You likely have a job, or some career, that produces work for society.
• If you have children, you're raising them and leading them to be a member of society.

So when they have access to this entity that is a copy of you, all of those details are carried over, with the differences that may arise from the different body.

Your significant other's brain doesn't go through withdrawal from your absence. Your family still benefits from your presence. Your consciousness can still produce work, especially with a body to go with it. So your business/career continues without the biological copy, too.

So to the rest of the world, they have a copy of you that's not subject to things like cancer. They have access to something they can likely continue to copy as well.

So the immortality is more like the abstract immortality we attribute to things like legacy.