What is the name of the convention center in which the first prototype models of the BluOnyx were first demonstrated? 
BluOnyx:  The first prototype models of the BluOnyx were demonstrated at the 2007 Consumer Electronics Show in Las Vegas with mass distribution expected later in the year. Consumer Electronics Show: The Consumer Electronics Show (commonly known as CES) is an annual trade show organized by the Consumer Technology Association. Consumer Electronics Show:  Held in January at the Las Vegas Convention Center in Las Vegas, Nevada, United States, the event typically hosts presentations of new products and technologies in the consumer electronics industry.
Las Vegas Convention Center