'Nobody' here is highly contextual. From what I understand, there are some markets (outside the US, particularly in the developing world. E.g., http://dazeinfo.com/2014/10/28/1-5-million-engineering-pass-...) where there's a glut of talented people. They are 'unemployable' if they cannot move and cannot find remote work.

In the larger sense, there are plenty of people who are unemployable (though it can be geographically or temporally limited in scope -- not always ,though): Zero Marginal Product workers: http://marginalrevolution.com/marginalrevolution/2010/07/zer...

To his point, though, the market in the US is still hot, and we're not /terribly/ far off from the first dot-com wave situation of "if you know HTML you can get hired in this market." Now it's more like "if you know Rails or one front-end JS framework decently, you can get hired." So if you have any skill, yeah, you're not going to unemployable here for a while, and whether or not you failed at your own company will probably not be relevant.