I see a lot of comments saying "this happened in the past, and the new technologies never made the humans useless". Well, maybe a good way to state the current problem is the following: the aim of this new technology is to produce humans. A potentially infinite amount of them. Running on electricity instead of food. Needing the space of a box. Without the need to sleep, socialize, furnish their apartments, look for love and raise kids. If the technology is actually possible, there simply can't be any space left for old style, flesh and blood humans in the economy.