As of today you can only see the year a song or album was released, and when you're searching for the latest music, that isn't really any good. Or if for example you hear a song by an artist you follow closely that you've never heard before, and you wonder when the hell that came out..
It's a simple addition that I feel would make it more interesting to discover new music.
As Carina_ mentioned, a similar idea has also been suggested here:
Add your kudos and comments there please!