Everything will depend on Marketing and customer satisfaction that Mr Musk’s Casino will provide.
I mean if Elon Musk promotes his casino in huge rate, then definitely more people will come to know about the casino and hence more people will test the casino or play there.
And while testing if they find better interface then stake, or better customer support then stake or better bonuses and rewards then stake, then definitely it will overtake our beloved casino Stake.com.