Inde development:
http://www.gamasutra.com/view/news/1962…t_to_expect.php
http://www.gamasutra.com/view/news/1765…with_indies.php
So, an indie developer can release straight onto the Playstation 4 store and can even opt out of Sony giving them feedback. However, it's not totally open like the Vita Store and XBLIG and you will need to win Sony over first for a license and development kit. It actually sounds like a reasonable middle ground between a closed system and gamepad massages.
Weird, posting Gamasutra articles feels a bit like linking Kotaku these days.