not the old mucha thing again.
that was waaaay before the golden age of advertising where it really developed into what it is today. and waaaay before the plethora of messages presented to us in modern media.
apples and oranges.
but, (and i've said this before) this medium comes about as close as you can get to doing both advertising and art. but, as soon as you have to do it for someone else, it's advertising first, art second. it has a job to do. gigposters are not strickly a medium for personal expression.