I'm sorry, but what is the 'actually' about?

Not very closely. The "inception" in the title of this piece refers to the so called "inception" layers in Google's convoluted neural network architecture. These layers are unique to Google - no one else really uses them.

In that blog piece it was more a reference to the recursive nature that produces that "deepdream"-style artwork. The code for that is available here: https://github.com/google/deepdream/