We've been getting taller for over a centuary, mostly diet/health related. Go to a third would country, chances are you'll be a head taller.
Yea i'm saying engineered too, although i think if misused it'll be the end of us. Diversity is they key to forward change and development, there is now a signifigant base of evidence to suggest that there are multiple ways of wiring the brain that are fundamentally different, loss of any one of these etc i think in the long term will cause a profound loss to the human race.
This wired article has some facinating insights. The other problem with engineering is social, and its twofold, apart from the usual debate - a whole now degree of class struggle, there is one of behaviour modification. What is a defect and what is a personality trait? Mild autism, ADD, short fuses, all could be called 'defects' and removed, yet in reality, many are the things that make us individuals, scary stuff.