Did you notice Sony will only let you watch streamed Video and Music sold to you by them?
No DLNA support
No USB support
No using a PS4 for home media
I've been called a paid Sony Shill on these forums, and I'm now saying that the XBox is the best all-round device for the next generation.
I used PS3 for streaming over DLNA. Now I use a dedicated tool that gives me actual freedom. I bought the PS3 because of those possibilities, that is true, but now that I used it, I would hope the PS4 is just really good at games. Sony-non-gaming only wants cinavia and other crap to add on those things.
As to the PS4, as all these things are essentially just software, I'm personally convinced they will add them eventually, after trying an itunes approach or collaboration with a specific provider per country via an app. If those fail, they will/can add them.