Even though the topics of meetup presentations are largely determined by the preference of organizers, the 4,000 member strong Silicon Valley NewTech meetup started in Jan ’06 hosted hosted over 155 demos & talks representative of what is going on in the industry (although some categories, like digital health, are, indeed, underrepresented).
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Vincent Lauria,  Lakshmi Narayanan and Todd Miner collected historical data on the past 3 1/2 years of svnewtech demos and visualized it by using Diagramic software developed by Alex Kouznetsov:

Data from the spreadsheet were analyzed after simplifying - by filtering out highly repeated keywords such as ads (you can‘t get away from them– no change since 2006), and using higher-level categories for blogs, search (no interest in 2009 compared to 6 demos in 2008, see below), social and similar keywords.

The result?

​We’ve transitioned from virtual worlds to virtual goods, are less interested in community chat and more in finance (be it social lending or accounting and fund rising), have less spare time and … may be ready for something new, not yet shown on the charts