I'll kick it off: 1. Self-hosted social networking. Lots of my geekier friends are getting frustrated with Web 2.0 sites such as Facebook or Flickr, for a vari

I'll kick it off: 1. Self-hosted social networking. Lots of my geekier friends are getting frustrated with Web 2.0 sites such as Facebook or Flickr, for a variety of reasons. They are retreating to personal sites to host their photos and blogs, and they just interact with the rest of the world with RSS. There are some missing pieces here, but people have been talking about distributed social networking for quite a while. We may be reaching critical mass. 2. Ubiquitous streaming video: right now, top bloggers like Scoble carry video cameras around at all times, and for special geek events, the grainy live video feed is standard. By 2019, that could easily be in everybody's phone (assuming the bandwidth is there, if not, then only in countries with decent telephony).