Hmm.. I got to say that I honestly do not know if I want a Half-Life 3 now. I mean I love the first and second game to death, and it really sucks that they did not finish the story. But I am thinking the reason they are withholding a third installment is doubt?
Maybe something happened in the company that put the Half-Life project on halt? Like key figures quitting the company. My point is, if/when Half-Life 3 is released, it better be a darned good game. It needs to shine over Half-Life 2 both in story and graphical fidelity.
If they cannot do that, I don't know if I want the game. Or maybe they are just being money grubbers these days and earn to much on Dota 2. XD