Eventually, we might be able to upload ourself into some substrate
People who believe things like this, that humans can just magically upload themselves into a robot, are classical 'smart idiots'. In every one of these hypothetical cases, both entities can exist at the same time, so you have not uploaded jack shit. You have merely created a copy - a clone.
We've already had this discussion in-depth on this forum with a Monero dev under the delusion that immortality can be achieved by uploading yourself into a robot:
https://bitcointalk.org/index.php?topic=971275.0