All I know is that before The Orange Box, I had never heard of Valve (mainly a console gamer for the last 12 years). Bought the Orange Box on PS3 didn't impress me at all to the point of returning it, which I rarely do. So I can't imagine people seeing them as a loss. Obviously the majority would disagree with me :)
Bet with Conegamer and AussieGecko that the PS3 will have more exclusives in 2011 than the Wii or 360... or something.