Matt Grandstaff, Global Community Lead for Bethesda, clarified in a post on NeoGAF that Fallout 4 will not be coming to PlayStation 3 and Xbox 360. In response to claims that the post-apocalyptic game could still be ported to last generation consoles, Grandstaff stated,
It is not coming to 360 and PS3, the stuff we’re doing will never work there.
Fallout 4 was officially revealed on June 3, 2015 for PC, PlayStation 4, and Xbox One. Rumor has it the game will release in 2015, though you can look forward to more information at Bethesda’s E3 2015 conference one week from today, on June 14, 2015.