Cabrera is on pace compared to some similar studs at the same age
http://www.baseball-reference.com/friv/scomp_bat.cgi?I=cabremi01:Miguel%20Cabrera&st=age&compage=29&age=29
He's on pace with guys that failed to obtain the record. This will require the perfect storm of a power hitter with a long career starting at a young age and remaining injury free with a great hitter behind him so he can't just be walked....it will happen someday.