Even if this did manage to get widely deployed, it would only harm legitimate users. Like every other non-interactive content DRM system ever created, it will

Even if this did manage to get widely deployed, it would only harm legitimate users. Like every other non-interactive content DRM system ever created, it will be easy to subvert any restrictions. HDCP did nothing to prevent movie piracy, the various music DRMs did nothing to prevent music piracy and this will do nothing to prevent "thing" piracy. Myhrvold is smart enough to realize this won't work in practice but he'll still probably profit from it. Corps will inevitably call for this sort of DRM to be forced on commercially sold 3D printers and when they do Myhrvold will be laughing all the way to the bank unless some substantial patent reform has taken place in the meantime, which it probably won't.