Singapore is banking on lavish beachfronts, canopy walks, a transformed port and even water taxis to upgrade its holiday island, Sentosa, into a major tourism draw over the next two decades – but observers say the challenge will be making it distinctive. On Friday, the Sentosa Development Corporation (SDC) unveiled plans to rejuvenate the 5 sq km (1.9 square-mile) resort and theme park island, which is a 10-minute monorail ride from mainland Singapore and is also accessible by car or bus via a...