Real time apps.. what to build next?

So Facebook wins the lifestream, Twitter wins status, and the battles for photos and videos etc is long done. What's next?

The real-time web introduces a few new battlefronts. These arising opportunities tap into real-time status updates to provide value to the community at large.



I just picked three categories of new products that can monitor real-time status and provide value-added services:

1. Real-time search is already here. Huge opportunity to re-invent search with relevancy of time and social connnection. Obviously Twitter is all over this. So is Facebook, Friendfeed and anyone in the lifestream market.
2. Bookmarks are dead. But links are flowing through status messages, and they can now be automatically aggregated into rankings or context. Twitturly and Stocktwits are two fine examples. Lots of cool real-time news / link aggregation across different categories can be created.
3. And there will be a growing category of real-time forums. These ad-hoc, live, interactive groups can be formed by matching interests or proximity automatically detected from status. I would place location-based services such as Google's new Latitude into this broad category. The next Browzmi version will sit in this box too.

Real time is going to be big time.. I am sure people have tons more ideas.