At what point will Rock be considered 'Classical' or legitimately Symphonic?
For certain Rock or Prog bands, are some of their more conceptual works worthy of consideration as 'serious music'? I am thinking at a level such as Mozart's 'Requiem' or Stravinsky's 'Rite of Spring' or Mahler's 'Resurrection Symphony'? Historically, many serious works were laughed or booed off the stage at the time of their creation, but were later respected as significant, even genre-changing.
Perhaps important Rock music is gaining respect from serious, musically educated, scholastic types such as college educators, symphonic music publications, critics, and reviewers. Would anyone agree? If not, how long does it take for a 'new' genre to gain acceptance?
An example of what I would consider an important work would be 'The Lamb Lies Down on Broadway' by Genesis (1974). Others would surely offer 'Close to the Edge' by Yes (1972) or 'The Power and the Glory' by Gentle Giant (1974). 'Crime of the Century' by Supertramp (1974) might be a good example.