What if the conversion happened without us noticing it?
All that medicine doctors give you when you are sick, or whatever.
Maybe we already are robots!
But all joking aside I don't think there will ever be a straight conversion, I think people would have the choice whether or not to go the way of the "borg". Or maybe they won't have a decision, the way the country is going we might have free will or choice in a few years!
So here's an interesting question: If we erase your brain and copy the brain data of sana8410 into yours. Then who are you?
If this could work, travelling would be so much faster. One could do an exchange, where two people switch brain data over the internet. Question is, if the brain data copied into the other person is not you - or your own brain is erased from the host body - then who are you?
Yep.
Stargate: Universe - How Communication Stones works
http://youtu.be/U0kJ3o72vGQ
Stargate is fiction. Even if the communication stones become reality one day, most people here will be long gone by then.