It suggests where to eat lunch if you haven't had it yet? Serious question, that would be an awesome feature, but I couldn't find anything on it. I don't regularly get lunch out but mine is always giving me "Places Nearby" which seem to have nothing to do with my interests.
It's always seemed to me that places nearby is somewhat based on time, I'm more likely to get the cinema in the afternoon and a restaurant in the evening. It could just be coincidental but it'd make sense if it is influenced by time. That's not as clever as knowing I haven't had lunch yet, but since I often have it with me or buy it in a supermarket or something, they'd have no way of accurately knowing anyway.
