Just gonna copy and paste my reply to the ValveTime Facebook post about this subject.
Chance McMichael — I know Half Life is the biggest thing on any Valve enthusiast’s mind, but thinking about Source 2… When Source came out, it was optimized thoroughly and, compared other games of the time, was incredibly beautiful. It didn’t rely on slabbing on post-processing effects and throwing shaders everywhere to deliver a crisp and vibrant image to the consumer, and I hope this trend carries over to this supposed “Source 2” which, if all goes well, will provide many enhancements over the Source engine such as improved polycount, texture resolution, shadowing, draw distance, seamless loading between maps, and much more, but also stick to the ideals that Valve created when making the original Source engine: That less is more.
TL;DR — Fuckshitcockballs Source 2 cool