On the desktop with 1920x1080 I definitely feel that 16:9 is a problem and if you expand that to 32:9 it doesn't really help. But once you go to 2560x1440 with slightly bigger screens the issue with 16:9 generally becomes wasted horizontal space.

I have found with 2x 16:9 that a lot of interfaces really haven't caught up to the widescreen aspect yet and I imagine that is worse. 32:9 is going to be great for gaming however and that is largely where I think 16:9 is much better than 4:3 and why I used triple screens in the past.