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I doubt aliens would know about us as a technological species. Radio waves are one of those signs of intelligence, and we have only been sending those out since the last century.
The stars we see and the radio waves/laser beams from alien civilizations would be millions or billions of years old. Would they even still be around? Would they be able to spread to neighboring star systems or anyplace in the universe?
And what would we consider life? I would think that a species of robots that can learn, program themselves, and are smart/curious, who have huge lifespans would be around for a lot longer than biological life.
I'm not so sure that their technology would cure us, unless they are very similar to us (which is unlikely), they might not have cancer, viruses, etc. And I know that there would be a bunch of people that would want to spread religion to them. But, it would be interesting to hear what they came up with first. The question I would want an answer to is, have they found any other intelligent life?
Are they here? I don't think so, unless they can stop time and safely move around the universe without aging(if biological). And they will have to find us, which wouldn't be easy. Having to navigate at speeds faster than light would be a challenge as well. The stars would be in different spots than what you can see.
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