I see a lot of "road/trail" hunting on ATVs. Load it up, hop on, and cruise the trails (or highways) looking for moose or caribou. I've seen folks driving while balancing the high-powered rifle across their knees.
I don't know about you, but when I'm driving an ATV it's really hard to take your attention off the rocks/sidehills/ruts/roots and spot anything unless it's standing in the trail in front of you.
I'm wondering about the success rates of this type of hunting. For me the value of an ATV is to get you into the country. Park it and walk away. Once you have an animal down, crank it up and haul it out.