While PlayStation 4 may not support CD/MP3 playback right out of the box, Sony hopes to add the feature in at a later date.
Speaking to Giant Bomb, Sony Worldwide Studios president Shuhei Yoshida explained that because everyone at the company has been working so hard to make this the best gaming machine possible, other entertainment features have taken a backseat.
The biggest surprise for us all internally at Sony was there are so many people who passionately reacted to our announcement that there's no MP3 support or CD support on day one. It's not like we actively decided 'let's not do this feature so people will have to subscribe to Music Unlimited. The focus has been more on the game features. Some of the features we wanted but we couldn't get in on day one.
We didn't really think about MP3 or CD. We thought 'we're going to do that eventually.'... It caught us off-guard. People don't really talk about these features, right? Some people get really mad and [say] 'I'll cancel my pre-order!' So as we speak, people in Japan - the system guys - are discussing when we can put these features in.
And so there you have it. Sony isn't trying to ruin your fun; the company has simply had to prioritize, and features like MP3 support simply weren't as high on the list. A perfectly reasonable explanation, right?