This chapter discusses ongoing and future directions of 3D Printing in architecture through a reflection on the topics presented in this book. It summarizes the key existing and emerging applications. It describes the new design workflows including structural modeling and optimization, custom connection design, system integration strategies, manufacturability assessment, and assembly planning. Finally, it concludes by discussing three upcoming topics in 3D Printing: artificial intelligence for 3D part design, large-scale printing, and computer-assisted assembly processes.