Are you pointing out that action shots would not be able to be made HDR in real life? If so, and with the greatest of respect, I'd just like to offer the philosophy that just because it can't be done in real life, there's no reason that we can't do it in game; if it
can be done, it
should be experimented with? That's the way boundries are pushed, the way things are taken to the next level. You yourself subscribe to the view that you use all the tools at your disposal to create art- this is an extension of it surely?
Just my point of view of course, and like I said, I mean no disrespect to your opinion, just opening up a point of debate.