I know that back in the olden times pitchers had more advantages (higher mound, no performance-enhancing drugs for hitters), but I've always thought that hitters back then were better than today. Far more .300+ hitters, and even though the HRs were less, there were far more RBIs to be had. Another record that I can't see being broken is Hack Wilson's 191 RBI in a season. Likewise, I doubt there will ever again be a .400 hitter. But I would love it for someone to come out of nowhere and prove me wrong.
Hack Wilson's record is almost untouchable. Just getting that many at bats with RISP would be tough enough.
Rush has talked about what it was like for George Brett when he made his run at .400 back in 1980. The media just hounded him. Can you imagine the coverage a player would get today? ESPN would have to break in for every at bat.