With the best will in the world, IMHO they'll fail. I spent two years studying natural language processing for a post-grad dissertation and came to the (perhaps startling) conclusion that "natural" language processing, i.e. the use of proper, colloquial syntax allied to the appropriate vocabulary underpinned by an understanding of culturally-tuned semantics is absolutely and utterly impossible for any entity which isn't able to reason about these things and draw upon external knowledge to supplement them, as opposed to merely comparing patterns, which is all that the ISI system does when it all boils down.

We're still a long way from computers that can interact meaningfully and consistently from a basis of self-awareness.