I think the problem with releasing media through the likes of E3 is that it's not really possible to demonstrate the experience on the home audience's 2D screens. In fact this will be a longer term problem once the 3DS comes out, we're going to need a reviewer's word on how well the 3D effects are implemented because standard screenshots and trailers aren't going to be able to demonstrate that.
So in lieu of us actually seeing what playing on the 3DS is going to be like, I'd like Nintendo to give some kind of idea as to how they see the 3D aspect of the device used in ways which will develop innovative new game mechanics (ie not just the same kinds of games we've already played but with 3D graphics, ways of using the additional depth to add to the gameplay as well as the aesthetics). I'm also curious about the stylus, not least because my experience messing about with a 3D TV is that as soon as you put your hand on the screen the 3D illusion of something projecting out of the screen is totally shattered. I'm wondering if the 3D effect might be depth going into the screen (like we saw with the Looksey DSiWare game) on games that use the touch screen, with stuff popping out towards the player only on games which don't require you to touch the 3D screen. That's if both screens are touch screens anyway.
I don't think we're going to see the form of the device at E3, but I think it's possible they'll confirm either that they're sticking with 3DS or announce a new name.