...which means mass-production of said battery will never see the light of day...

I actually doubt that will happen. I suspect that M$ will force users to change similar to the Office change to the Office Ribbon a few years ago. The goal is to get developers developers developers to write apps for Metro, and if they give users a way to turn off metro they are basically telling developers not to bother. The metro interface is likely here to stay and will probably get more obnoxious and invasive in future Windows releases.

One problem...FSC cigs (mandated now in all fiddy states) will likely put themselves out before you can flick it at the pump...yep...screwed by uncle sam again...

The way I see it, you willingly accepted the interview. If the potential employer wants to test your ability then they have the right to ask you to demonstrate some basic skills at least. You obviously can refuse but I somehow doubt it will endear you to them as a candidate.

As a small business owner of a tech company I would question the abilities of a candidate who refuses to demonstrate at least a basic proficiency in their craft. This becomes even more relevant if the candidate has a degree/diploma from one of those 6 month - 1 year training programs and little work experience.