Well, TW2 graphics are just a cherry on top - it was made with story/plot and characters in mind, the graphics are "side effect" of making a new engine

it was built primarily to handle non linearity and interaction plus huge enviro...damn I'm so excited right now.
Cat potion and the highlighting - it represents the sounds the body makes, you even see vital internal organs on enemies! Its your enchanced senses that allow you to percive like that. But I dont like the blue stroke around guards - I like the hud minimal with game corresponding visuals. Just my preferance, no big thing though.
I suppose the voice acting will be above average this time (english I mean).
Both games are on my list, but for personal reasons I'm more looking foward to TW2 than DA2. We'll see how it turns out in early 2011
Geralt face and scarred body looks amazing!!!
And its still early alpha I think O_O so...what will they put in next?