I know the ps4 has some new features being added to the client like remote play, the ability to stream, and keyboard/mouse support. But, aren't those features already built into the ps4 anyways?

The pc client is 9.74GB and the ps3 is little under that in size. Why or better still what is the ps4 needing 38GB for?

I know nothings been said yet just wondering what your ideas might be. Reasonable guess as to why?

Also any dev or community rep response would be helpful. Not that the size matters much but it be nice to know. I'm still excited for this weekends beta but curious none the same.