We don't know about anyone else, but we love to see classics in HD for the first time and although animated features aren't our first choice, any time there is more HD content for our kids to watch over and over again, we're pleased.
Then, the musical references to classics like the final trio of "Der Rosenkavalier, " to signal renunciation of youth and love (there's even a nonsinging character called Sophie), and the orchestral passage after Tosca murders Scarpia, festooning the corpse with candles and a cross (here, the diva burns her photographs and then snuffs all the candles in her apartment).