I think there could still be plenty of violence. maybe more varieties (hmm bring back 'gibs' as an option) and more ways for the players to bring them about. Creative violence. Does it always have to result in death or can things like morale now player abigger part and you frighten your enemies into running/surrender/negotiation
Unfortunately : more variation == more complexity == mosr costly
Somehow they (game companies) have to greatly improve their production methods to make creating more good stuff alot cheaper or we are stuck with any imagination they do have being hampered by production limitations.
Something like that might also allow more niche games that might explore more gaming themes/mechanics with requiring 10-50 million dollar budgets (and give us alot more choice than a few dedicated indies can produce).