A good friend in Vegas believes that the casinos will use the reopening of their casino floors under COVID as a lever to finally ban smoking in the entire building. Can't smoke if you have a mask on. And the constant cleaning/replacing of ash trays is a labor-intensive piece that they'd like to eliminate, using the cover of protecting their staff via social distancing.
I still don't know how a dealer can be protected in COVID conditions, given how easy it is for the virus to reside on the surfaces of playing cards and chips.