Katawa Shoujo actually addresses this in-game. One of the game's characters, a blind woman, describes her dreams including sensations from her other senses: sm

Katawa Shoujo actually addresses this in-game. One of the game's characters, a blind woman, describes her dreams including sensations from her other senses: smell, taste, touch, hearing. As something I have wondered about, I was really pleased that the game's authors thought of this.