It's unlikely ever to happen, but I wish someone would start an airline that only requires pre-2001 levels of security screening[0]. I'd be interested in seeing how having some competition on security policies would affect the larger market. Would people value the sense of security that the theatre gives them, or would they prefer the less invasive measures?

Unfortunately, AFAIK, every airport in the country is required either to use TSA screening or to use private security companies whose policies are set by the TSA[1], so this is unlikely ever to happen.

[0] With the exception of ensuring that cockpit doors are always closed and locked during flight - this was the one absolutely critical security improvement that came out of 9/11.

[1] I believe SFO is one airport that uses a private company.