"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,'" he said. "The focus has been more on the game features. Some of the features we wanted but we couldn't get in on day one."
As such, Sony is working to add these features in an update. "We didn't really think about MP3 or CD," he continued. "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."
http://www.eurogamer.net/articles/2013-11-12-sony-is-working-to-add-mp3-and-cd-support-to-the-ps4
