I'm going to say this, I "blame" Hollywood for the current state. The '80s had Arnold, Stallone, Van Dam etc... as super heroes and young guys wanted to mimic this trend. It was the first time muscle became a focal point and enhanced by the "me" mentality of the decade.
Also, the physiques of that era were thought to be a tangible goal. A low dosage and the knowledge of a high protein diet allowed so many to have the full pecs, 18"+ arms, lat spread and vascularity. Were they close to looking like the top 50 pro's, not even close, but it appeared as though that bridge wasn't too far to cross. Today, the top 50 pro's are freaky huge and appear to be morphed in all the magazine's editorials, clearly showing how unattainable it is for those not willing to put their lives on the line. Hollywood focuses on the "regular Joe" physique as the super hero thus creating a new trend.
'85-'99 were great years for pec sweat, big traps and double steak dinner physiques.