IMO the fact that Xbox One is a devkit in my home, and I can make games with it via a free software download is incredible.
In fact this alone makes Xbox One worth paying 100's of $ more for it. Christ with this its worth over $1000 more than the competition.
I am buying a console that is a devkit out of the box. This is a first in history. Not only cutting the costs for indie devs. But opening the door for anyone to become an indie dev, and the possibility of a HUGE mod community.
I dont see how the other consoles can even remotely compete on price, when you get all this for only £80 more than a PS4.