Sony has announced that Journey and The Unfinished Swan are currently being remastered and will be released for PS4. This news comes as of no surprise as both games were listed by Sony last month.
Both games have already been confirm to run at 1080p on PS4, but Sony didn't state anything regarding both games' frame rate. Journey will be availbale as a cross-buy title, which means that those that purchased the PS3 version can download the PS4 version for free. Sony has not yet confirmed if The Unfinished Swan will also be a cross-buy title.
Journey and The Unfinished Swan will be released on PS4 later this year. For those of you that can go to Gamescom 2014, both games will be playable at the event.
Source: Playstation Blog