Quoted from rubberducks:Anything with something remotely capable costs a ridiculous amount.
Still used by most modern slots.. and in heavy common usage in redemption machines now too. You dismissed as not even of this earth... yet it's common place in the industries where innovation really is happening. Slots and redemptions.
You don't have to have the entire PF glass or the cabinet to make use of these kinds of things. (for instance, look at how the ghost effects were done in GB... localized effects).