I once had an argument with about a dozen xbox fans about this. I remember saying, "so, when ms said every console is a devkit, they meant project spark". An extraordinary number of people came forward telling me I was ridiculous and that every console was actually a devkit, and how this was already the reality, and how news was coming on the morrow. I think one person said it was one of the major reasons that they bought a unit.
I said it would never happen, and the others said it was already happening and pointed to a list of indies with ID @ xbox. In the end, because neither side could prove it was or was not real, we all agreed to watchful waiting for that surefire announcement... my acknowledgment was a shade more sarcastic than genuine. I still don't think this will ever take place, but as usual, "Not canceled" is a pretty good argument against my own. I guess we'll just have to wait and see, as usual. I think I'll watch from a safe distance. Better to be outside the house when testing the foundation.
Quoting a certain user from December 2013: "No, if you knew anything about the Xbox you would know that it can go into dev kit mode. This is a game for PC 360 and X1"