I think it's in a similar situation to gimmicks that Nintendo sometimes puts into their systems. Most games are cross-platform. They aren't gonna change the game fundamentally to take advantage of the different input mechanism. If your system relies on it, chances are you might not get a port. That's why almost all games that take advantage of these features are first party. The few that aren't are usually shovelware or if you are lucky 1-2 cool indie games.