The Ep1 Source engine added HDR and better facial animation, the Ep2 version added dynamic lighting and the ability to render big open spaces.
So what technical improvements/features do you think the Ep3 Source engine will have? What would you want it to have?
Personally, even though I’m not a graphics whore I do think (and hope) that there will be some graphical improvements. It would also be nice to have a 64bit version of STEAM and the new Ep3 Source games that doesn’t suck (64bit HL2 anyone?).
Also, better AI and NPC interactions.