Here's a very expensive idea for a small amount of entertainment.
There's something I like about waking up in unfamiliar surroundings. I enjoy the strange dreamlike feeling and the exercise of getting reoriented.
My idea is to have a bedroom that rearranges itself while I sleep. I would wake up with the bed in a new position, perhaps at a new height. Other furniture would have moved around as well. How hard would it be to wake up to a different color scheme? Or in a different room altogether? If I were a megabillionaire I would be an eccentric one; I would hire a different designer every day and arrange to wake up to a completely different room, just to see how it feels.