I watched it (uh, interacted with it) over the weekend and it's okay. It's gimmicky, and I was hoping for something more like a book or a documentary, but it provides more insight on what's been going on in Valve over the past decade. Basically they can't make a game because their libertarian model sucks and isn't ideal for politics let alone trying to convince several hundred people to make a videogame together.
In their defense, I think some of the more senior people relented on this position around the time Alyx development really kicked off, and people like Robin Walker -- who have been there since the pre Half-Life 2 days -- are game directors without the official title -- because for some reason everyone at Valve has an aversion to being called a director or a lead of any kind, which is probably why in Left 4 Dead an entity called the director is actively trying to kill you and your friends.
Also, the two other VR games that Newell boasted about it in 2017 -- the third would end up being Alyx -- were (surprise!) cancelled. One was a Minecraft like a game and the other was being helmed by the fine folks from the Kerbal Space Program team. They has also had an RPG they started in 2013, which took inspiration from Dark Souls, Monster Hunter, and Elder Scrolls -- Geoff's words not mine -- but didn't make it very far in development, apparently. Left 4 Dead 3 and Half Life 3 definitely existed at some point during this decade, and I wouldn't be surprised if at some point they decide to resurrect the projects. They were at least two Left 4 Deads in development, and one was an open world, which I imagine played a lot like a Left 4 Dead version of DayZ. Half-Life 3 sounded weird. It was like a base-building game with a story. Would have probably ended up becoming a battle Royale game, honestly.
So yeah, apparently they have another game far, or relatively, in development, but I don't think it's necessarily a VR game. I think the studio is still split on whether or not they want to continue making games exclusively on VR platforms, and I wouldn't be surprised if the company continues to struggle with finishing projects because of this. The rumors, which are not address in Final Hours, about the internal struggle to use Source 2 or Unreal Engine are given some more credence since it seems like one of the reasons many of these projects ended up failing was due to the difficulty of developing Source 2, which was unusable, apparently, for a good long while, while trying to simultaneously develop a new game with it.
I hope this doesn't come off as some sort of Valve bashing since they get enough of it from the rest of the internet. They somehow got their shit together and ended up making an excellent game in the end, even if it took longer than I'm sure any of them would have hoped. I do think they have a tough decision ahead, about VR and all, but I think the company has learned plenty of lessons while, as Robin Walker put it, wandering in that Wilderness.
One final note: the company is interested in making a full-scale, non-VR Half Life, but the scale of it is kind of a concern at the company -- they'd prefer to make something smaller like a hat. Is this the other project that Valve is currently working on? I don't know, but I'm sure will find out sooner than later when Keighley releases his next final hours in 2030.