The only thing that I can think to this is that: AI developments will remain a centralized projects for several years to a decade, focusing on specific area of usage like medical diagnosis, stem research, commerce, anything.
This will remain until hardware capabilities improve in terms of computational power.
The when 5g networks comes in and decentralization of AI developments have made its footing. The the BIG BANG OF AI TECHNOLOGY WILL HAPPEN.
I give it several decades more in the future.