I think the best suggestion is that the game was delayed in certification because of issues, and it would have released later... and by the very fact that they figured out how many sales they would get from XBO and that the delay would mean that it wouldn't be worth the effort (duplicating disks, patch costs etc)... and then decided to drop it.
I would doubt it is parity issues and MS... MS *are* particularly picky about resolution and trying to ensure the XBO has features that set any games released on their platform above their competitors, but we've already seen lots of games with lower resolution etc than PS4 already... if it was due to that (which I don't think it is)... they would be setting a very bad precedent and could end up with publishers deciding its not worth the effort if the hardware isn't up to the job... because the alternative is reducing the performance/resolution of the PS4 version (and if that got out that would be very bad PR)... so i don't think so.
Making an indie game : Dead of Day!
