I like to think Yatzee throwing away the pasta art of the Half-Life lambda is symbolic of Valve's limiting Half-Life 3 news to pathetic rumors, if anything.
Valve missed a great opportunity to at least say "Well, since this next generation of consoles is strong enough for a PC-centric game engine, we are going to release Source 2 games on these new consoles years from now." PC gaming may be the "master race", but most people would still prefer everything already set up for all main sorts of entertainment in a fairly cheap box.