Ehm ... i was kinda hoping for next week.

I mean, since it was playable on that event, it should be prepared for release no?
SteamDB has two (actually: four) different builds for EGX (including one for the press) and patch 6 ("patch6" and "patch6_ch" - and I don't think "ch" stands for Switzerland, so I wonder what this may mean) listed.
The EGX build probably was one with a few things which Larian wasn't so sure about (read: "QA didn't sign off, yet") switched off / removed. I'd do the same if there was a strict external deadline (I'm a software engineer in real life).
Also there is the limiting factor of Larian having to produce a PFH as well, which may cause additional delays (production value of PFH videos is surprisingly high, this is not done in a single day), which is why I would actually prefer not to get a PFH, but a simple "hey, my name is Swen Vincke, let me quickly show you in this 20 minute lets play video what is new while you download the update on Steam" with only the game on the screen and voice recorded while playing. But thats just me.