As much as I love HDR imagery there is always a fine line as to when it goes too far and makes shots look unreal.
For still images I think this can be a real problem as it makes the shot difficult to relate too and overall less accessible.
HDR video on the other hand makes the real look surreal, with bold colour and and odd tonal range. The key difference, for me at least, is that video is a format where is visual is constantly changing and there for provide the key elements needed to relate to the scene.
Well some very clever people over at sovietmontage have now managed to achieve this effect using a beam splitter and 2 Canon 5D MK 2 DSLRs.