Yesterday, Sony gave a presentation explaining a bit about the new PS4 hardware
, the development environment (Windows 7 based IDE), and the changes to the Dual Shock
controller. From the article: "The system is also set up to run graphics and computational code synchronously, without suspending one to run the other. Norden says that Sony has worked to carefully balance the two processors to provide maximum graphics power of 1.843 teraFLOPS at an 800Mhz clock speed while still leaving enough room for computational tasks. The GPU will also be able to run arbitrary code, allowing developers to run hundreds or thousands of parallelized tasks with full access to the system's 8GB of unified memory. ... The DualShock 4 controller that's standard on the PS4 eliminates one feature that was seldom used on the PS3 —the analog face buttons..."
The trackpad will support two touch points, the rumble motors can be controlled more finely, and the analog sticks were tweaked for "reduced dead zone and better feeling tension that grips your thumbs."