We're still waiting to hear from the Tropicana, Treasure Island, and the Stratosphere.
Station Casinos, who has several properties in Las Vegas but none on the Strip says it "won't charge for overnight parking," and being geared towards locals, would be unlikely to charge any sort of fee for parking anytime soon.
Regardless, the gaming industry will be watching closely to see how this plays out, just like when MGM Resorts introduced "resort fees" -- an extra charge added to the hotel price that guests often don't know about until check-in.
"MGM is famous for making decisions that are unpopular with the public, as they did with resort fees," adds Simon. "A few years ago, they were the first ones to do it. Other properties actually then adopted them afterwards."
Simon also thinks for now, a struggling resort like the SLS can take advantage of the situation to draw people who are just looking for a place to gamble on the Strip. "If they don't really have a preference between the MGM Grand and SLS (for example), I think a lot of people actually will go to SLS because of the free parking."