Yes, CES is the biggest consumer electronics trade show in the world, and it was held in early January. Lots of Asian companies presented there, or were there to make deals. It was Jan 7-10 this year, just before travel restrictions went into effect.

Many big BIG international conventions take place in Vegas. If there's an industry for it, they probably have a convention in Vegas. It makes sense for Vegas the city to incentivise cheap flights/hotels, which makes it more appealing for business groups to meet there. And of course come spend money in the casinos and restaurants after a hard days work of conferencing! I know a few people that went to Vegas just to party for a long weekend etc. But the vast majority of people I know that went to Vegas, went "for work". Also yes, CES is a big deal.

They get 42 million visitors per year and 20% are international

https://www.lvcva.com/stats-and-facts/visitor-statistics/faq...