I think Ultimate Guitar just yanked this from another interview, can't remember which one, maybe the one with the Captain. But I remember JP saying this word for word previously.
Anyways, I like how the 7 string inspired him on Awake, so I'm hoping they get him an 8 string before/during the writing for the next album, different flavors are always nice. That said, I don't see him going straight djent because he has eight strings, I see him utilizing it in a manner similar to the 7, and still maintaining his style, just with an extended range. Meaning he'll probably use it for some heavy stuff but also a lot of clean arpeggiated chord stuff as well.