Among the major hotel markets around the world, Shanghai, London and Dubai are projected to open the most hotel rooms in 2026, according to pipeline data from CoStar, a leading provider of online real estate marketplaces, information and analytics in the property markets.Among the major hotel markets around the world, Shanghai, London and Dubai are projected to open the most hotel rooms in 2026, according to pipeline data from CoStar, a leading provider of online real estate marketplaces, information and analytics in the property markets.