The PlayStation 4 announcement didn't show any of the console itself, but did show the redesigned controller. The DualShock 4 bears a lot in common with its predecessors, with a few tweaks like the touch pad and dedicated Share button. And while Sony isn't quite ready to call it the final design, it's close.
Sony Worldwide Studios head Shuhei Yoshida told Engadget that the controller is "near final" with some "small tweaks" yet to go. The console itself is "still in development in terms of final specs and design," which explains why we didn't see it.
Yoshida also pointed out that he favored giving those in attendance at the reveal event some hands-on time with the console, but says the hardware designers were uneasy with journalists finding "some detail" that isn't meant to be public just yet. He claimed that people will be able to start playing it "by E3, I think."