Destinations change, and Las Vegas certainly has over the past 20 years. What was once a leisure/gamblers centre is now the No 1 USA centre for major trade shows and business events, driven in no small part by the substantial hotel capacity and airline connectivity from within the US. The major hotels have added significant conference facilities. I must see several major trade shows in Las Vegas advertised directly to me each year.
Orlando is trying for the same market, it's still primarily leisure now but is likely to shift over time.