Heretic777: Just from my own purchasing experience in the last 4 months, i can say that Amazon is the biggest threat to Steam. I have bought alot of games on Amazon that i would have normally bought on Steam, but the Amazon deals are just too good. I have yet to buy a single game from Origin.
Just as an example, Amazon had Just Cause 2 for $2.50 and the best Steam sale is still $5. Thats a 50% savings. Alot of Steam buyers are buying from Amazon and i think Amazon will eat more and more of Steam's market share.
Nah, the best steam sale for Just Cause 2 was 2 bucks, period. Still, your point stands.