Mega-cruises are becoming copies of the great Las Vegas resorts

According to Castillo, "our estimates, from the feedback of 105,000 cruise passengers, show that the gigantic size of the ships is creating a new experience, but also that this mass experience is less satisfactory than that on traditional cruise ships."

For the researcher, the productive improvements and innovations in the shipyards, which have made the mega ships possible, have made the cruise ship operators look for a leisure model that fills the abundant space that these new floating cities offer. In many of these ships, the classic model of luxury ("like the false first class of the Titanic") has been abandoned to copy, with great precision, the theme parks of the great casino resorts of Las Vegas. For this reason, according to Castro-Nuño, the majority of the cruise ship operators no longer focus on the traditional cruise ship market of pensioners with high incomes, and honeymoon couples, but instead are trying to attract mass middle-class family tourism.

According to Lopez-Valpuesta, the mega cruise ships have many similarities with the resorts of Las Vegas, beyond just having casinos: the traditional formal dress code has been abandoned for something clearly informal, even on cruises run by premium operators; the ships have greatly expanded the shopping possibilities available, and, even more so, the gastronomic possibilities, with the cruise operators now competing with the casino resorts to offer the most spectacular buffets; tourists enjoy similar shows, from those in the style of Cirque du Soleil to the same magicians and singers, as well as great water-related entertainment facilities, from swimming pools, to replicas of the famous fountains of Las Vegas's Hotel Bellagio on the high sea. For this reason, both models of tourism share the same business model, based, after a process of business concentration, on an oligopoly, where a few businesses, with a dynamic pricing system, which changes greatly according to the time of booking, offer very aggressive prices. In doing this, they look to maximise occupation of the great resorts/ships, so that they that can then try and get their guests to spend as much money as possible in the facilities due to the fact that they are captive, whether that be because of the daily high temperatures of Las Vegas or because of the sea in the case of the cruise ships. For these reasons, it should not be a surprise that the same corporations, like Apollo Global Management and the Genting Group own some of the main Las Vegas resorts and cruise ship operators.

In addition, for Castillo, the unstoppable expansion of this sector, with close to 28 million tourists/cruise passengers in 2017, makes him think more deeply, as cruises have broken with the axiom of the tourist sector that the majority of positive economic impact are produced in the destination visited. Even the traditionally reviled "All Included" beach resorts generate almost all their employment in the destination where they are situated, from workers to providers, and they contribute to the maintenance of the welfare state with the taxes raised. In contrast, cruises, independently of where they dock, generally only have a marginal relationship with local providers, and direct employment is usually concentrated in the countries of South-East Asia, from where a significant part of their crews come. The positive impact is reduced, except for in the port of embarkation or disembarkation, for example Barcelona, in the form of shore trips. Though even the money spent here is impacted upon by the shops and restaurants available on the mega cruise ships.

Whatever happens, according to Castillo, no tourist destination can afford to remain outside this area of expansion, although it is necessary to find a way to increase the social and economic benefits for the destination.