Yeah. The residences cost between $2 million and $15 million. Even the low end of that would be too much of a stretch for me, even before considering fees. If I could afford that, I still wouldn't want to spend $2 million for a little studio apartment. For a billionaire, to throw that in as one of several homes, would be great. But even for a low-end millionaire, it's just not practical as an only home.
A lower-upper-class person would do better simply booking regular cruises back-to-back. Cruises are surprisingly cheap if you shop around and are flexible. For example, I just checked and found a 42-night cruise, starting in London and hitting 22 ports across the Atlantic and in Central and South America, starting at $3,479. That's about $83 per day, with all your food and on-board entertainment included. I found prices starting as low as $18.43 per night, and scores of options for less than $50 per night. Do the math -- you could take $50/night cruises every day of the year for just $18,250.... with food, health club membership, and entertainment all included.
That strikes me as a more realistic retirement option. Let's say my wife and I end up with $2 million in retirement savings, and we can live off about 5% of that per year, adjusting up for inflation, without exhausting it. That's $100,000 of income per year, or $136 per person per day. You could very easily see the world by hopping from cruise ship to cruise ship, for that kind of money.