Hmm yeah.. I can really see the practical implementations for such a vehicle.. NOT.
Interesting engineering project, but in reality no one is ever going to need to drive through such terrain, (as there will nearly always be an alternative route), and if its absolutely neccessary to get in to such places helicopters would be a quicker and far more efficient mode of transport.
Nothing is practical in the offroad world, but thats not the point. Technically any vehicle that goes over the speedlimit is impractical but, wouldn't that suck.