Here's some disappointing news: You're never going to get an Asimov-style humanoid robot. They were only ever invented (by Karel Capek) as a way to talk about an awakening laboring class. There's no way anybody is going to ever build a truly autonomous C3PO type robot, because what could you possibly use it for that would justify the massive R&D investment? Maybe it could hand out brochures at tradeshows. More bad news. No time machines. Not ever. Because, look, no matter how far in the future it happened, if they were ever to be invented we'd have always had them.