As a Forge hater I must say that the new environments look better, the pieces look somewhat better, and the lighting is great and will really help.
But this just has me disappointed. This video seemed to suck all the magic out of Halo 4. So empty and lifeless. It still looks one solid color and boring. I appreciate what they've done, but bah what a turn off.
I really hope Forge maps are pushed aside to their own playlist (we sort of know this) and I hope to play then as minimally as possible. User created maps are just not fun for me to play on. I'll maintain that Forge is great for customs, mini games, and the Forgers themselves, while it totally sucks for everyone else.