Source google image: http://images.pushsquare.com/news/2018/06/guide_why_doesnt_sony_allow_cross-play_on_ps4/attachment/0/original.jpg
Fortnite cross platform announcement
Source google image: http://images.pushsquare.com/news/2018/06/guide_why_doesnt_sony_allow_cross-play_on_ps4/attachment/0/original.jpg