The only downside is when a game is a heavy story based game. If you watch someone play it from start to finish it might no longer be a game you want to buy.
This is true, i might not be so interested in a game anymore after ive watched it played by someone
With that in mind do you think a lot of game companies are keeping streaming in mind when they make games?
Not at all, look at a couple of them, story based mode games...but look at a game like GTA, different story lines but similar missoon