The article is nice, but is not particularly accurate. Both Carter and Mohammed Bamba (who is even more highly rated) have shown interest in attending Harvard. The reality, however, is that Bamba is a one and done and projected high lottery pick. Carter is not that far behind. Professional basketball is their future career and they are likely a short time away from that happening. If these were top 50 type kids who would likely spend 3/4 years in college it would be a very wise decision to attend Harvard. As neither expects to be in college more than a year (perhaps 2 in Carter's case), it does not make sense to forego playing against elite competition to get prepared for the pros. Even if Harvard or another Ivy has a strong squad their schedule can not be dramatically improved, nor can their facilities, to compete with traditional schools.
Don't get me wrong. I think the top tier Ivy teams are good. I also think this would be a wonderful situation. I simply do not see it as a realistic scenario.