I for one, hope for the day when the American mindset of "bigger is better" is finally quashed.
Of course that won't happen until fuel prices get to stratospheric levels. Then maybe you'd see people actually enjoying camping by spending time outside instead of cooped up in their huge shiny RV with their a/c blasting, kicked back in a recliner watching their huge flat panel TV's.
The campgrounds I've been going to lately are essentially boondocking places - lots of folks with tents and popups and b-vans (especially VW vanagans!) These Japanese RV's would fit in these places very well indeed.