Freeman
Banned
My gut says Source 2 won't be an insane state-of-the-art visual engine like, say, Unreal Engine 4 or whatever. Or at least demonstrated as such. Not that it won't look gorgeous, but current Valve doesn't strike me as that sort of company. They'd be more about an engine that scales extremely well across hardware configurations, has tools and workflow very easy to develop with, and excels at processing effects/simulations that have the strongest potential for gameplay (eg: physics).
I would be fine with something like that, I wonder how much VR was on their mind while coming up with their engine and if that translate to anything significant for VR.