I find myself in somehow disturbed when visiting some (big) online casinos and there is hundreds and hundreds of slot games.. presented just like that ..
This is not resembling in anyway the slot machines in a (real) casino !
I thinked of what if making an organisation like, for example making rooms for each game, with a limeted number of slots, say 10 for example. every (machine) identified apart, and every one with his own progressing jackpot,
So for example when entering the room you have to choose from the available (machines) to start playing !!
That could be a nice idea for the payer but for the casino this is a problem, the level of complexity when managing their slot machines will grow exponentially and their profits will not increase at all, this also reduces their profits because if each machine has their own progressing jackpot then there is a chance players will get lucky as there is no time for the house edge to make a dent on the capital of the players, so for the most part I think that what you are proposing will not happen.