foxfirestorm87: I admit, I was looking into this as well, since it sounded like the Soundtrack was suppose to be available before launch day. Though guessing from the blue, that is not the case.
Alas! I was hoping to listen to the music today while out driving.
If you are still interested you can download the OST and wallpapers through GOG galaxy or steam by these methods:
GOG Galaxy:
Click the Cyberpunk 2077 icon within the interface.
Next to the "play" button, within the game page there is a button called extras.
Click on extras. All the patches, music and art is available to download on this page.
Files will download to: Drive: \Program Files (x86)\GOG Galaxy\Games\Cyberpunk 2077\!Downloads
Just unzip the files there
Steam: (I don't have the game on steam, but do have the witcher 3 definitive edition - also has included soundtrack)
open steam
go to library
right click on Cyberpunk 2077 in the list of games
cligk properties
click browse local files
the soundtrack should already be there (probably in a folder called soundtrack).
Location: Drive: \Program Files (x86)\Steam\steamapps\common\ Cyberpunk2077