What some deem "useless" or "bad" ideas can evolve to become very useful. Twitter, is a great example. Very few thought they'd succeed. Now they're huge and growing and I bet 5 years from now, they'll be doing things even their founders can't imagine.

Likewise, whether Qwiki survives is independent of their idea, but rather their ability to adapt their product to customer needs and above all, their ability to execute.