It's amazing how people say they "need" a Suburban when they only have one kid; I'm exaggerating a little...maybe. Yet when I was growing up, my parents made due with 2 kids in a vehicle about the 1/3 the size of a Suburban. You can see this inflation of vehicle sizes within the same model line over the years. It's shocking to see an old school 3 series next to the current F series.
Eventually, we'll be seeing these on the road: