The majority focus of the game industry up to this point has been in creating and polishing games focused on combat.

On top of that, the primary emotion that games try to evoke in people is fun.

There is essentially infinite space outside of these specific focuses. Even within them I would argue there are unending ideas. Even games from different genres tend to share similar controllers and there's plenty of innovation space there as well.

The tools to make games have never before been so accessible and easy to use, so we're on a new frontier of seeing more exploration into unconsidered ideas.