Yeah, but you have to buy the retail collectors edition, or the silver and gold package from Steam.
It recieves a upgrade but its not an remake of the game. It still looks like the orginial but just a tad better. For example, realistic water, general physics and higher defintion models and such. But it does not look like Half-Life 2.
It used the same graphics engine, but its remade with it, its just touched up. They would have to remodel characters, and level design. There are rumors of a mod that remakes Half-LIfe with the source engine, but it was turned down by valve. Because of this turn down, they are rumors that Vavle will remake the orginal.