Still too many unanswered questions about PS4 that could kill the hype...
Will Sony include the PSEye with every PS4?
How much RAM, how many CPU Cores, how much GPU resources will the OS use?
Used games? Always online?
I don't think that the PSEye will be standard. Sony is giving far more importance to other features. They're even including a headset in every console unlike Microsoft. They're betting on social features and having access to different kind of contents seamlessly. They have also added extra features on the controller while Microsoft left their controller pretty much as it was.
The camera so far has been treated like an add-on which will be probably used to differentiate the entry level SKU which will be as cheap as possible from the fully featured model with a bigger hard drive.
About RAM so far we know that 1GB of memory is reserved for the OS.
The system won't be always online, they said they didn't even take that thing in consideration.
Used games won't be blocked at a system level but publishers will be able to implement different measures to 'protect themselves' if they wish that way. Realistically offline passes (but not with the cost of the full game LOL).