It's not competing with a mouse, it's competing with "a mouse and solitude in a man cave", since these are coupled together due to the fact a mouse can't be use

It's not competing with a mouse, it's competing with "a mouse and solitude in a man cave", since these are coupled together due to the fact a mouse can't be used in the living room practically. In other words, if this is close enough to the mousing experience to make the net experience of playing PC games in the living room better than the same experience with a mouse in solitude, it will be a hit.