What's left for facebook apps?

Today, Insidefacebook has an interesting post about the most engaging categories of facebook apps, as shown below. (Screenshots courtesy Insidefacebook)

Clearly Games is out numbered, which is a little unexpected to me. It seems Social Networks is designed for fun, but is it? Think about the real life social networks. Yes we do seek for fun in our networks, hanging out with friends for fun, joining groups and participating activities for fun, etc, but we also do a lot of serious stuff in our networks, too.

So, there is still margin left in the facebook apps battle. Honestly I'm really tired of writing on walls, sending all kinds of gift, rating my friends through all aspects, doing all the surveys... and stuff. I'm really looking for something that is meaningful and functional on a daily basis to me, and hopefully generates some sort of value. So developers, think from real life, what can be done or can be improved in a social network, you'll stand out of the crowd.