I think it's an excellent question. Not because a candidate needs to have something special about their network (although if they do, that's a plus and a chance for them to talk about their interests) but because if they can't describe something they own, why should anyone think they will have the communications skills to describe something they're going to be working on?

I mean as extra points that help the candidate look interesting. It's like the "other interests" section on a CV: you should treat it as an opportunity to market yourself and add a hook to catch the interviewer's interest.