Tretton said that while they can show the PlayStation 4's capabilities, they don't yet have a "mass-production box" to show, with the final look of the console still in development. Tretton goes on to argue that capability is more important than the physical look of a console, which is absolutely true.
As far as the price goes, there's no final decision there either, but Tretton does hope that it'll be cheaper than the PS3's original price of $599. Look for the PlayStation 4 to make its actual physical debut later this year, most likely at E3 in June.
via The Verge