Good concept, but Cell Shading... I'm not sure. The only game I played with Cell Shading I actually liked was Wind Waker on the GameCube, it's not a graphics style that I really like though, it really needs a non-serious context for it to be worthy. It might end up being a fun game overall but to be honest I'm not really interested in that type of graphics especially not for a first-person-shooter, whatever goal it tries to achieve, being like an RPG or not, for me FPS games need a serious look and feel to them unless they are done with the sole purpose of exaggerating all aspects of it such as Painkiller, Serious Sam or No One Lives Forever, which are all superb FPS games, but it only works on extremes, either give me a very serious tone and dark (in graphics and/or context and events) one, or a very funny and exaggerated one, but don't try to combine both...
Anyway, time will tell, I'll wait a few months, see the general consensus, look at many videos, and if I think it'd be worth a try I might end up buying it. The one reason why I might buy it however isn't because I would like to get "beyond" the uninteresting graphics style, but more because I feel like I need to play a good FPS, since I believe that the genre is dying in quality since the past few years. The "best" FPS games I played were so scattered during the past five years or so. The one I play the most right now is Fallout 3... and it's not even a FPS game at heart, just an RPG under the disguise of the first-person-view because the engine is too old to make third-person-view animations worthy to even look at for a minute without wanting to quit out of disgust. At the moment I am eagerly awaiting the next S.T.A.L.K.E.R., and to be honest even though I do honestly want it I'm not exactly thinking that it's the best FPS idea to come out in the near future, I want something new, refreshing, a new standard, or maybe I'm looking too far away and need to come back to the disappointing reality.
And what in the great heck is Valve doing with Episode Three...