Probably because of the success of the Warriors everyone has been talking "positionless" basketball as the future. I think the success of Rob Williams, that big kid down in Phoenix and even the results Moses Brown got in OKC are notable. The league had hampered defences severely making it way to easy for guards and forwards to attack the rim. The obvious solution is to have bigs that actually guard the rim. Bigs like Baynes, Horford, Kanter could control space around the rim but not the rim itself. Williams specifically and Brown possibly are players who block lots of shots and change lots of shots. That they can dunk anything within four feet of the rim and also run the court is just more icing on the cake. Brown and Williams don't need a jump shot, what they can do easily and naturally is perfect.