As I look through ebay for good deals on a Canon 1-DmkIV for sports, it occurs to me that digital SLR cameras might not be very long for the world of high-end sports photography. As High Def and Ultra High Def video cameras get better and better, it's just a matter of time before the best way to capture the moment is to just capture ALL the moments, 60 times a second, and then sort through them later and pull out the stills you like. The equipment for this is currently more expensive than a high-end dSLR but for situations where money isn't really a big obstacle (like the NFL) I think the writing is one the wall.
Here's a much better in-depth discussion than I could ever give over at A Photo Editor: Is it Time To Eliminate Stills From Your Shoot?