Maybe, but I don't know that we'll actually see many of those systems make it into production. 2035 isn't far away, and if the push for 'lectro power continues unabated, I see resources being put into EVs more than ICE. For instance, a free-piston generator in a hybrid car could make sense, but the question would be why bother with free-piston development when installing a higher capacity battery would greatly simplify the vehicle?
Playing with the valvetrain is relatively simple and well established. I expect to see more refinements like this new BMW than outright new tech brought to the ICE market. I hope I'm wrong, though. It's a lot more interesting seeing where ICE can go than increases in power density in whatever battery tech is the flavor of the day.