This sounds odd to me:
> ... neural signals could predict upcoming words in a sentence. ... This kind of predictive coding is something we associate with being awake and attentive, yet it’s happening here in an unconscious state
In psycholinguistics, the assumption is, and always has been, that language processing is unconscious, a background process like visual object recognition. For starters, conscious attention is too slow by two orders of magnitude, and infants can process language, while presumably not yet (fully) conscious.
What you call "conscious attention" seems to be a sort of cognitive process. What the article calls unconscious state is a state. The idea is that in some states, some processes (like predictive coding) don't take place.