Waterslide? Check. Detachable island flotation device? Sure. An aft deck that transforms into whatever your out-of-touch-with-plebeian-society desires require? Like you really had to ask.
Called the C-Stream, this concept out of Studio de Voogt is designed for families. Super rich families, sure, but even kids with $2,500 tricycles need something to keep them occupied on the high seas, right? There's even that waterslide, because public waterslides on land are just so dirty and common.