NFL football has not really changed since the Patriots were born in 1960.
Yes, they've been major innovations like the WCO etc etc thru the years.
But consider this: The 3 most important units by far on any team are:
1. Qb
2. Ol and DL tie
This is true today, was true in 2010,2000,1990,1980,1970,1960.
Wrs, cbs and rbs are irrelevant compared to these other units.
I had this argument online in 2003. I won.
Go back and study every single SB Champ ever. Virtually every single one was strong on all 3 of the 3 big units.
You can innovate all you want. The basic importance of the Big 3 will never change. Never.