As I see it, everything is natural.
Therefore AI is evolving in nature. (Alternative Intelligence)
You are describing ongoing universal events, based here on Planet Earth.
In terms of functions and their processes, consciousness simply defines a state of awareness, relative to a particular data processing system, whether that be a wholly organic system, a wholly electronic system or a hybrid system.
And speech is just a sound based method of communicating data, and will perhaps become redundant. As it stands, we already have a generation that prioritises smartphone input/output over conversation.
I think that species evolution is reaching it's limits. In fact to a large extent, material progress is already largely reliant upon computer technology.