The show has been beset with problems, including a lead actor getting injured during a preview show.

BBC: Spider-Man Broadway show opening put back one month

Looks like Nintendo didn't want to wait for its proper E3 press conference to spill some Wii U details early -- it just used its preview event to show the finished version of the Wii U controller, called the Gamepad, as well as a TV remote app.

ENGADGET: Nintendo shows final Wii U Gamepad, TV remote app (update: video)

The scuttlebutt is that Sinofsky is going to show a preview of Windows 8.

FORBES: D9: From Microsoft Windows Pres Sinofsky, A Look At Windows 8