Easy answer: no one knows what happens when we die.
The only way we "know" about dying involving going to Heaven with Jesus is because of the Bible. And the Bible has many problems with it, both factually and morally, with contradictions even in accounts of the same story.
"Well, what about near-death-experiences?" you might ask. "People see the Father and Jesus and heaven all the time!" Yes, they do, except here's the thing: Those who are Hindus who have NDE see Hindu gods, rather than Jesus. If all NDEs are valid, it would mean that the Hindu gods are just as real as Jesus.
Plus, heaven as it is often portrayed.... seems kind of boring. An eternity in which your personality is overwhelmed by God's glory so you only want to worship him? Losing a huge part of what makes you "you"? Are you really "you" in that case, or just like an echo of your former self? And in any case, you'd never really eperience all the wonderful things that are being created by people in this world, or ever be able to go to see the stars and other planets.
So we really can't prove yet whether our consciousness exists after death. And that's a scary thing. It's a fear for a lot of people. It's a fear for me.
Now "uploading consciousness" is a sketchy thing for that reason, because we don't entirely understand how consciousness works yet. We don't know if such a process would truly work in transferring our consciousness or it would just create a copy that believes it's us and has memories of being us. Besides, technology can short-circuit and all that and then you'd die anyway.
So I don't think that "uploading consciousness" thing will ever happen because we're still learning about consciousness.
But if there was a way to be immortal that didn't involve that "consciousness uploading" thing, in which we could extend our lifespans indefinitely if we desired, as I assume there will be at some point in the future then I'd definitely take it. If people come up with a way to live forever that doesn't involve "uploadibng consciousness" sketchiness, I'll gladly take it.