In future buildings will be built by machines and materials automatically drop into place

HG Wells : science fiction author
"In future, all materials will gradually fall into place, moving on paved paths for this, and will be gradually molded walls, as homogeneous as paint is squeezed out of a tube by the artists" - HG Wells.

Although building is not entirely automated, there is a significant degree of mechanisation in the modern construction industry. For example, robotic cranes.