I also think elementary school ought to run from 8am to 5 or 6pm, and include multiple rest / free play periods, as well as daily music / art / sports activities (rather than the rotation that gets PE in once or twice a week).
Um yeah...that's not happening! Here in PA we are cutting things left and right. I wouldn't be surprised to see the days drop below the current 180 before long. No way will days ever be that long. I can't say I'd want my kids there that long anyway. Sounds like a working parent's dream though.