I buy the idea that the game is getting faster and more highly skilled; it's just the nature of all sports in general. Talent level goes up as time moves forward.
But I don't think it's prudent to assume that in today's game (or in the future) that you won't need talented bigs. Obviously players like Colon don't do a damn thing for you, but Blake Griffins and Cole Aldriches do. Hell, Maric is probably auditioning for a role in My Giant 2 right now and he was a great player in the B12.