Dear Esther: Landmark Edition has been out on the PS4 for a while now, and obviously the 'original' version has been out on PC for years. Well, if you bought the Steam version already and fancy replaying a tarted up version of Dear Esther then check your Steam library as you should have the Dear Esther: Landmark Edition added to it
you can also buy Dear Esther: Landmark Edition from the likes of GoG and Steam for £7.99. and if you're very lucky, you can also pick up one of the limited edition Limited Run
region free physical edition.
Oh, and there's a free dynamic theme for the PS4 too