You've hit the nail on the head, sir.
I do have a few points:
Through what evidence do you conclude the inevitable heat death of universes? Is this not another extension of anthropocentrism; a mortal being having difficulty grasping the concept of infinity/immortality?

I would say also that:
"...The entire universe is converted into a single vast thinking machine"
Full stop.

And last, philosophers and sci-fi authors have long speculated about whether or not silicon based life can exist somewhere out there...
Wouldn't the machine race we're about to give birth to qualify as exactly that?