Microfinance, Nanotech, Biotech, Software/Hardware/Connectivity
Vinod Khosla's Green Tech Sweep
I put microfinance in the same league as the sectors touted as the next big things: clean tech, bio tech, nano tech. People in the industry keep referring to the challenges in the last mile. When it is time to dole out the money, it gets complicated.
Web tech is relevant to all these emerging sectors. You are going to need specific kinds of software for specific tasks in nano tech, for example, although many generic web tech stuff will do just fine. The big minds in nano tech will still be on Facebook and Twitter, will they not?