could work in really bad terrain.. bogs, tundra, deep snow.  brazil bro is right, too slow for a field or a desert. but it certainly could have applications. gaurding radar arrays in alaska! and its pretty fucking cool looking.   function follows form.  the tanks form has taken many shapes over the years. the best form (we know of) is the one we currently have. but i would imagine, as its function changes, so will its form.
Canada