I think it'll be hard for this kind of rap to go mainstream simply cuz you can't use quotations or italics or any kind of noticable symbolism to highlight the wordplay rappin on audio. Maybe they can mix in some sound effects to help. But mostly, peeps, the mainstream, the ones who raise record sales are just too busy or too dumb to try and figure out complex wordplay. They'd rather be spoon-fed simple (still good) shit like 50 Cent and Eminem (who can get mad complex, but if you notice, only his funny voiced shit makes it to the air, cept for maybe "Cleanin out Closet"). Peeps want to keep it simple. They got too much to think about in their own lives then to waste brain cells trying to decypher someone else's.