It's probably important to have realistic interpretation because then the artist's audience can actually relate to it. The role of the artist has change ( if any) may have been the fact that now not only do they speak for themselves, their art now expresses other people's feelings too that can not express on their own.
This piece is abstract. It is unknown to the eye what exactly it is looking at without an explanation. To many at first glance, this piece may look like a collect paint that has been stroked and blobbed, without careful planning or though, across a canvas. Therefore, there is not a clear subject matter, and no universal decision could be made. There is however content. When you look a this piece is does create feelings, however they may be different for each person who views the piece and for the artist himself.