@umbra21 - I think there is something to sound poetry. If it is read aloud in the right way, it can certainly tell a story, as we get so much from voice cadence and gesture and things like that.
But even without a story, I still find it has value. It's just a burble of sound, the same way that music is a burble of sound, and if it's done well, it can be soothing or rousing or whatever.
I like it more than visual poetry, to be honest, because I think most visual poems are fairly obvious and badly done, just an ordinary poem arranged into lines so that it looks like a relevant object.
Both are arts that can be done well or done badly, but I think that visual poetry is done badly more often just because it's much more popular and obvious as a technique.