Sony has put out the "ultimate faq", which is apparently their attempt to rip defeat from the jaws of victory. The PS4 will not feature DLNA or MP3 support.
Unbelievable. Both were features I use extensively on my PS3, and I know of other people did, too. Seems insane that this would be looked over, I can only think it was a conscious effort by Sony to force people into their Music Unlimited and video services.
I am so close to just calling it quits on next gen for now, after almost a year of being super hyped about the PS4, the wind has left my sails pretty much completely today with this FAQ.
UPDATE: Have had some info shared with me from someone who indicates this isn't a permanent situation, at least the DLNA part. Nothing official yet, but sounds promising.