Do computers fit inside jewelry and get worn on clothes? Yes, RIFD chips and iPod shuffles are jewelry sized.
He didn't miss smaller than state movements having significant influence, he mentioned that ultimately anyone will have the capability to severely disrupt society. Computer viruses could be a serious problem when brain implants will be widespread. Science fiction writers thought of this in the 50's.
No one is claiming that those predictions will be exact to the last detail. We don't know how AIs will look, how brain implants will work in detail today. Maybe 140 char messages are a vital piece of such systems, we'd stumble on that anyway.
You don't need to know every detail. If Google didn't happen, some clever social networking portal system would have happened. If facebook didn't happen, some other way to ID users would. The larger trends are obvious, the details are not.
VCs saw The Matrix. They care how your startup fits into the market in this decade, they want to see something that works now, not hot air about how amazing the future will be.
(Intelligent assistants are GPS things that tell you where to turn and voice activated customer support menus. The prediction about new forms of government are social networks. The underlying idea is that as communication becomes more frequent, less of a hassle, governments and corporations will get reorganized, the startup mania is part of that)