Large ceremonial kukri vs. cow *Not for the squeemish*
I think the kukri's usefulness beyond ordinary knife and machetes probably comes into play when you need to work with harder wood, such as dry oak. The extra weight and hardness of the blade would make it much more suitable to chopping something like that, whereas something like a bowie would have difficulty getting through, and take more damage ESPECIALLY if you needed to baton it.
Plus, you can't make a tomahawk/axe/machete do this:
[YOUTUBE="0DHGlhFJH0g"]Kukri vs. kitchen tasks *everything is butter*[/YOUTUBE]