I think it matters to an extent. Certain glasses are curved certain ways to concentrate aroma, and in some cases even to attempt to have the drink hit the proper part of your tongue first. There are other things to consider too, such as when you serve champagne, the point of the flute is to keep the carbonation in the drink longer, if you serve it in a glass with more surface area open to the area, its going to lose its carbonation quicker, go flat and no longer taste properly.
Now this isn't to say that for certain things one glass won't be as good as the next. Especially with every Belgian beer on the planet having its own specific glass, I doubt they are going to make that much of a difference. However as brewt00l said, getting 6oz of a quad in a pint glass would be a little upsetting, especially if you are at a place that is known for their beer.