My guess is modular will still be an option, if not the only option. x86 CPUs have really been PCBs for over 20 years. You are now starting to see a move toward

My guess is modular will still be an option, if not the only option. x86 CPUs have really been PCBs for over 20 years. You are now starting to see a move toward SoMs take off in the embedded world, which combine the CPU and RAM on a module to simplify board layout. In the past, these would have been separate components that customers laid down themselves on their custom PCB.