Amid headline acts, light shows and other fanfare, the Hard Rock will publicly debut its $1.5 billion expansion this coming Thursday with light beams shooting 20,000 feet into the sky. The project includes Hard Rock Live, a multi-tiered, 6,556-seat theater that is destined to be an entertainment hub for everything from Broadway shows to headline concerts to boxing matches. Besides nearly 640 new hotel rooms in the guitar hotel, there also will be a promenade of more than 20 shops, fancy new restaurants, a new nightclub venue and a lagoon called Bora Bora.