The info so far, for people trying to keep up:
Definite: Sony have an announcement to make, 20/2/13 at 6pm EST.
Rumours: It's PS4.
PS4 is out November US/Jap, Feb 14 EU.
The controller has no start/select/PS buttons, but instead in the centre of the controller is a Vita-esque touchpad. There's also a "Share" button somewhere on there, that allows you to take screenshots and 15 minutes of video to upload to the internet.
Sony want to have 8GB of GDDR5 for system memory (see above as to why this makes no sense).