Good point Justin. I guess my feeling about the hits of the future is that they won't be the dramatic head shots we saw in the 90's and early aughts. I used ot love those. I didn't know at the time how dangerous they were to the players.
I suppose I should clarify myself. In lacrosse in the 80's and 90's you could hit with your head (spear) in most pockets of the country. I played in Upstate NY and it was encouraged. When I got to college (circa 2000) I continued the habit but quickly found out that it was a penalty down south (VA, NC), It is now a penalty on all levels in all regions. I can tell you with the most confidence that the hitting in lacrosse was much more violent back then compared to wha you see now today, That's where I'm basing my assumption that football's greatest hits are in the past.