Those are good references, esp,
Player Piano by Vonnegut (Actually, there's a wealth of Vonnegut work that deals with an unusual idea of the future...Like "Slapstick"...Hi ho...

)
The original story behind the two "Rollerball" films is actually a short story by William Harrison, concerning this one guy, Jonathan E., who's the best in the game. Sort of in the background, Harrison sketches out a world in which there are no longer any nations, just corporations.
In the absence of war, which Harrison postulates is neccessary to human need and desire (!) the corporations have invented this game called "Rollerball" which, because of rule changes, gets progressively more lethal, until it's just bloody chaos, and only Jonathan E is left.
If you can find it, it's worth looking at (also under the title "Rollerball Murder").