The only thing new about 3D is that it finally looks good (meaning almost as good as a GAF Viewmaster). But to enjoy it, you still depend upon cumbersome eyewear. I think it will be big in entertainment (films & gaming) and to a lesser degree live chat/video telephony (for those who are interested in such things), but I doubt that it will dominate in the world of passive computing.
It'll start with games but I wouldn't be surprised if we saw a 3D enabled "browser" within a couple of years. In the beginning it might be driven just by being 'cool'. But then I'm sure we'll see some real UI enhancements based on it (just like we saw with the recent AJAX/'JavaScript is Okay' trend).
So if "web is dead" refers to 2D HTML, I think it may be in it's sunset years. If it means external references from one piece of data to another, no way. That's here to stay, just in other forms.