Yes we were all meant to have our own personal nuclear-powered rocketships by now too!
But I agree with the predictions of impending immortality... IF we don't destroy our civilisation first, or if we aren't decimated by a virus, or a sentient machine/s. 100-150 years sounds right to me, but hopefully it'll be before I die, because being dead is I believe like passing out, like too much salvia extract or DMT non-existence... a turned off computer... it's no fun. I feel sorry for the suckers who can't afford the immortality treatment when it's first invented and die knowing they're just missing out, watching the newly-immortal glitterati on hospital televisions.
Then after immortality, maybe we can wire ourselves up to photosynthesise rather than eat, then eventually shed physical matter and move as energy, travelling across the universe at lightspeed! :shock:
But these aliens as people describe them are far too human looking. If they did exist as they have been described, then I would say they were relatives of ours, from a parallel universe or 'time travellers' if it's actually possible (because time doesn't really exist, it's just a method of measuring change).
I guess they could be taking forms that resonate with us but in that case you'd expect them to make themselves look human... maybe. It's interesting how 'the others' used to look just like people according to our ancestors, whether angels, elves, fairies, dwarves or monsters, but now we view them as looking different to us.
I don't personally believe we are being visited, but I'd welcome being proved wrong. But I do believe that people are seeing things, whatever they are, just like how people have seen ghosts... and I look forward to the proof!