I've had a lot of experience playing Dark Heresy, I've also played; Rogue Trader, Black Crusade, Only War and Dark Heresy 2nd Edition. Fortunately the group I play with own at least one copy of most of the books and I have most of them in PDF form but we're disappointed that we won't be seeing anything new in the future.
If we're very lucky then FFG will work extra hard to get as much as possible released in the next few months and if they're really nice then if there's anything left unreleased at the last minute then they could dump it all onto the internet as digital-only.
I can see GW wanting to regain the monopoly on boardgames but I'd have hoped that they might leave FFG with the roleplaying games. I can't see GW picking up the baton in that regard and from what I've heard of GW's attempts at RPGs back in the 80s, they left a lot to be desired.