Indoor pools are awesome, but they also are a huge waste of space when you don't want to go swimming. If you have a mansion, that's no big deal, but for most people, space is a precious commodity.
With the Hydrofloor though, any pool can be closed to look like a regular concrete or stone floor with just the push of a button. You can even stop the rising floor part of the way up to just make the pool more shallow -perfect for those who have children.
Check out more cool pictures of the design over at Homes and Hues: Don't Let Your Pool Take Up All Your Space -Try Hydrofloors Instead
You would probably need waterproof furniture, otherwise.