Walk-in bathtubs are marketed to people who can't get in and out of a regular bathtub, because of weight or joint conditions. But some of them look really cool, almost like sitting in a car. I can envission a large screen TV and bath time being transformed into a drive-in movie experience.
You don't have to be obese to enjoy these. So, lose those pounds and enjoy your walk-in tub as a bit of excessive bathroom luxury.