A couple of months ago we sat down and collected together everything we NEO about the PS4K after info regarding the since-confirmed PlayStation 4 upgrade leaked online. Now the documents that appear to have been the source of the information that formed the basis of those first intel drops have been leaked online too. While the lengthy PDF doesn't offer anything particularly revelatory, it does offer a lot of potential information that the technically-minded among you will be able to analyse in more detail.
It was expected that Sony would unveil the PS4K/Neo during E3, but shortly before the event Sony quietly confirmed its existence as a means of explaining why it wouldn't be appearing. No further details of significance have been revealed regarding the upcoming hardware upgrade, although during our interview with Sony's Jim Ryan at E3 we were told that they will show Neo when they have the gaming applications to demonstarate what it is capable of.