I hope that this is misinformation, because it’s quite shocking to think that Half-Life 3, after all the gentle hinting from Valve, and the obvious public interest surrounding it, would not even be in production.
Then again, they are working on Source 2 now… can’t Source 2 progress be viewed as Half-Life 3 progress? During the 6 year span during which Half-Life 2 was being developed, Valve was not only creating a ground-breaking FPS game, but also a ground-breaking FPS engine! So, once development of Source 2 is “complete”, and Left 4 Dead 3 (Which, due to recent leaks, seems like it’ll be their next game), has shipped, Half-Life 3 should be their next project, logically. Seeing as their spiffy new engine should be mostly ready, and since they most likely have some solid Half-Life 3 consepts on the table, the wait shouldn’t be too much longer… (A few more years at most… right? )
Also of note, Laidlaw is “no comment”-ing this on his Twitter, and given his record of dis-swaying rumors, this seems to be an actual leak. Stuff we’re not supposed to know about… Just something to chew on.