Yoyo Games announced today that Game Maker will soon support exporting to PS3, PS4 and PSVITA. This means that alongside the PC, Mac and Linux release I should be able to also release Playstation 3, Playstation 4 and Playstation Vita versions of Ethereal!
There are certain things I have to work out to ensure this will happen so I won't give any 100% guarantees, but I will say its extremely likely you'll be able to play the game on those systems.