It's an easy platitude to say that technology obviates some jobs whilst creating others, but the new jobs tend progressively to more complex and/or creative work, that use the leverage of technology to do work that would have once needed many people (if possible at all).
Currently, the issue is cloaked in arguments over protectionism and trade, because Chinese workers are (for now) cheaper than robots for many things. What happens when automation is cheap and sophisticated enough that starting a manufacturing business is only slightly more difficult than a web startup is today? (Exhibit A: Projects such as Fab@Home and RepRap) It is, I suspect, not reasonable to expect even a significant percentage of people to handle the kinds of career that will remain.
While it's fun to imagine a world where one person can create enough wealth to support hundreds of people... what do you do with those hundreds, who can no longer create any wealth a machine can't do better?