Volvo made a concept car with glass A pillars and no B pillars.
That was interesting, thanks. Good to see how much of its safety features are now common (blind spot assist, adaptive cruise control etc.) And, given this thread, amusing that the wikipedia article doesn't pick up on the A pillars.
I'd love to see a transparent A pillar but I can imagine the parallax issues (talked about in other comments here) would make them a bit weird.