The reason why Morton and the machine couldn't enter Victor's dreams
Morton mentioned that the Machine is partly organic. Maybe, Victor's body has some sort of extremely rare condition that makes him uncompatible to the Machine. His child will inherit this condition, and together with Victor they will be able to make a new, better
version of the Machine.
- Well, Episode 5 has Jossed the "his child will inherit this condition" part, it seems...