As Amazon announced their investment in a prefabricated housing start-up, factory-built homes may just become the next voice-controlled, super-efficient must-have in the future.  Cheaper and quicker to build than traditional housing, modular homes are viewed as a solution to housing shortage.  To top it off, Amazon seems keen to ensure the homes of the future are fully-compatible with the latest Alexa capabilities, allowing it to launch more than a dozen new smart devices powered by Alexa.  Plant Prefab, a prefabricated housing start-up, has captured £5 ...