Vietnam and Cambodia are so 2007. Now, Laos is shaping up to be Indochina’s next hot spot. Ancient sites like the Wat Phou temple complex and the capital city of Vientiane are drawing culture seekers. Luxury teak houseboats are cruising down the Mekong. And global nomads are heading to Luang Prabang to sample the Laotian tasting menu at 3 Nagas or hang out by the infinity pool at the seriously upscale Résidence Phou Vao.