It might be unrealistic to exhibit games on CRTs if they aren't going to be played on CRTs - if you've got a lot of headroom with the 30fps target, is it worth trying a subtle CRT emulation shader? Especially with people frequently having 120fps+ monitors, it seems like a subtle fadeoff could be made to work.

P.S. I thought your original question was madness, but now that you've posted your projects I can totally see why you're targeting lower framerates. I really like the mood, have wishlisted TO:RI