Alan Young the lawyer who stuck down the old laws said it will likely takes 5-10 years to run another successful challenge. This is a new approach and nothing like this has ever happened where half the transaction is illegal. Part of the reason it will take 5-10 years is because they will need some time to see what comes from the courts so they can run some studies, that's how the first laws were stuck down.
He said he predicts that the Johns won't go to these indoor establishments because you don't want to be a sitting target and that the Johns will prefer to do business on the street and be a moving target, therefore the sex worker will go where the money is and will take risk(working the street) because the Johns won't go to these indoor establishments where you can be raided at any moment. He said that most of the trade happens indoors right now and as a result of this new law street sex work will increase.