Looks like we made it out of there just in time, early March, before the madness erupted.

So far, MGM is closing all its buffets.
Vegas buffets shutter over coronavirus outbreak - The Washington Post
and Wynn initially tried having its own servers serve up all buffet food so that no patrons would need to touch the serving utensils, but gave up
So long, prime rib and crab legs: Wynn to close buffets, will screen guests temperatures - Los Angeles Times
and is shutting down buffets too.

Wynn is even installing body temperature sensors at its entrances to detect and confront any potential guests who are running a fever.

The casinos, one by one, are closing all day and nightclubs, all spas, and even the fitness centers.
MGM Resorts announces layoffs, closures, 'several' employees with coronavirus | Coronavirus | fox5vegas.com

Some articles mention that casino workers are being laid off or placed on stand by, and this internal document from MGM Mirage corroborates that:
Name: Mirage_correspondence.jpg Views: 1130 Size: 15.1 KB


Or next Vegas trip is currently scheduled for early May. Let's see how things are by then.

In the meantime, we are not postponing our early April vacation to a tropical Paradise. We will be gone most of April.