SSD drives are great however I cannot see it making that much difference when it comes to how games are designed. Developers will still go with there own game design choices. Linear style games wont see much difference because they are designed around scene by scene while openworld games can benefit but how much are devs willing to invest and design even bigger worlds? Is there a thing as too big? because sometimes for me, when I play openworld games, being too big can be a chore.
I welcome the faster load times on both consoles and honestly that's all id expect, if they do more with it great but I couldn't care if they do or not. They just need to continue to make great games.