DSD coming to Qobuz streaming?

PS Audio has a small but interesting downloadable library of DSD albums on their Octave Records label. All these titles were mastered in DSD so you get the full benefit of what DSD has to offer. If you choose to pay and download, be sure the DSD file is one that your DAC can process … for example the max my DAC can handle is 256 DSD files.

Just a naive question. Is there an advantage to DSD over high res PCM?  I can see the advantage of DSD if the original recording is in DSD (there are very few recording masters done in DSD … Boston included). However, if the original recording (the master) was in red book or high res PCM what does DSD bring to the party?  DSD can not add musical information to what is not already there in the original recording. Finally, does your DAC not covert your music files to PCM before doing analog conversion? I love the idea of DSD recordings but taking old PCM masters and converting them to DSD does not seem to offer much.  What am I missing?