Modern armies are making greater use of snipers. Not just because snipers are among the deadliest troops on the battlefield, but because better technology is making it easier to get long range hits consistently. There are even computerized sniper sights that can turn just about anyone into a sniper, at least for shots under a thousand meters.
If American infantry is to retain its battlefield dominance anchored on superior marksmanship which was demonstrated over the last couple decades, training will need to change to adapt to this trend, as I wrote on the USNI Blog last year.