Sad thing, but one might ask: what exactly were those great stories about in the first place? What exactly was there value to humanity? Did they answer the 'Why?' question in a sufficient way? Apparently not, since they disappeared. So is it a bad thing that they have ceased to exist? Meh.
The only great story that makes any sense is this: we are on a little planet in a place called the universe, which is a big place, maybe even the biggest place there is. Why? There is no why. We just are, and we got to make the best out of this life since it's most probably the only life we have. Everything that comes after this (i.e. death) can only be worse. (Trust me on this one, I've given this a lot of thought.)
Projects? What for? And what exactly should these ideals be? The spread-throughout-the-galaxy-story? The-make-love-no-war-story? The there-is-a-god-watching-over-us-story? We've heard them before. None of them has a good ending. Except in Hollywood studios which is the only place where we will ever accomplish these things to some extent.
There's just no other big story left, but this one: it's all in vein.
Oh, and maybe this one: we only have this one little planet, and it's most probably all we will ever have, so we should take really good care of it, because our lives depend on it.
Now, this is in se, a sad story. Not a small one, mind you, but it just won't do for way too many people: 'You're insignificant, make the best of it. Even nature denies your existence.' People who have given up on the other big stories (the projects of humanity: religion, science), have only one possibility left: make themselves seem more important than they really are. Turn their own little story, their priivate project into a big one, one that they can believe in, but also one that is perfectly doable since it's following their own standards.
Fall in love, get married, make unnecessary children, buy plastic garbage and wear a fake capitalist smile, for instance. That's doable, and if you manage to do a little sport on a semi-professional level (so your name gets into the papers) or you join a choir, you can actually have the feeling that you mean something after all.
No more heroes anymore.
There are still big stories in the east, though. Stories people believe in, with morals and values and symbols and all kinds of funny stuff. Which they don't properly understand, of course.