Drew Olanoff suggests that Twitter could extend the hashtag idea to make "bits and pieces of data clickable." I'm not a fan of Twitter these days, but I love the idea of incorporating data structure into online content through simple affordances. Ah, so that’s Twitter’s strategy: A “clickable” world - The Next Web:

"By structuring data, Twitter could make its network of information easier to navigate and discover upon. It would also help the company structure its API so that third-party developers wouldn’t have to dig through every single tweet for particular information. I can click or tap around Wikipedia for hours, since everything is linked by its editors. Twitter could engage users in the same way."