It would be very good if they did the ultrakill for the ps3 since the console could run it without problems, since it is a wonderful game and it would not be bad to do it on a previous generation console.
While we will be looking at the possibility of console ports after the game is done, PS3 won't be happening since the current version of Unity doesn't support that and there isn't enough of an audience to warrant remaking the whole game in a different engine.