nobody really knows, but Richard MacManus has some interesting hypotheses.
In 2009 we’re seeing more products based on open, structured data e.g. Wolfram Alpha. We’re seeing more real-time apps e.g. Twitter, OneRiot. And we’re seeing better filters e.g. FriendFeed (and Facebook, which copies FriendFeed – er, I mean is inspired by).
In a nutshell here are some of the new or noticeable trends that we're seeing on the 2009 Web:
* Open data
* Structured data -> smarter
* Filtering content
* Mobile (location-based, so you could say that's smarter use of data too)
* Internet of Things (the Web in real-world objects)
There’s also an interesting embedded slideshow on the page.