Maybe one of the reasons printers have come up so often is related to the difficulties of envisioning how this technology will be useful (not that it won't) in practice. The ability of millions of NFC-equipped devices to communicate is a capability but it will be interesting how this translates into usefuls apps. Lots of possibilities.
Chuck, you mention printers multiple times in your article. Who uses those anymore? I don't think that the IoT was targeted at printers. Those have been around for a long time and the connections between the network and the printer is a pretty well established thing. I really don't want my refrigator to print out an alert at 2AM.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.