This isn't a very late April Fools joke...that I know of. Valve has apparently said that there will be an add-on for it's wildly popular Half-Life 2 game. The specifics of the game are still very unclear. It is known that hero Gordon Freeman's sultry sidekick, Alyx, will play a large part in the add-on, but in what context is anyone's guess. Whether she will be a playable character, as previously rumored, is unknown. It's not much, but check out Gamespot for more details.
I've heard about that too, as well as an extra level for people with beasty PC's to try out some new light thing. Did you read the april fool's "News" though? That was quality, really got me going til I read they were taking Dust out of the map cycle.
u think graphics will be even better in the expansion or improved? that wud be kick a*s cuz they are already so damn amazing compared with other games.
I think the graphics will be the same as in HL2. I doubt we'll see anything drastic as the Steam engine is there. All that has to be done is create another game with it.