Compared to the online gamblers, there's more online gamblers than casino goers so definitely it would not affect a lot on the overall gambling industry.
Nowadays that the trend is online gambling and we can gambler through our pc and phone, for sure people are not worried about this as if they can't go to a physical casino, there's always another alternative which is the online casino.
If you are sports gambler then there is a big difference as some of the high stakes matches will be cancelled because of the issues that we are going through globally and things are getting serious as the disease is spreading faster and you need to take precautions to avoid the spread. I never thought it will be a huge problem earlier but now things are changing and until the virus is not quarantined then i am not willing to spend time in a crowded place.