More relevant than HR and RBI to be sure, but still becoming increasingly irrelevant. Even for the casual fan, it confuses me why they pay attention to Batting Average as their sole ratio-indicator when On-Base percentage is so readily available.
Me? I like OPS (on-base plus slugging) the best. It's simple enough for non-statistics oriented people to understand, but it effectively and efficiently displays who the best hitters are, by balancing plate discipline abilities and power.