It used to be that racing improved the showroom offerings... now I am not so sure anymore. Is it possible that what is good for the highest levels of racing is not necessarily a good thing on the street or in your garage? I can think of a few go-fast goodies that never made it to production.
Racing still improves street machines...just not everything is applicable. Supposedly the oval throttle bodies on the current gen. SBK motors were developed and refined on the MotoGP bike.