Xbox EVP Matt Booty clarifies Microsoft's new exclusivity strategy, saying new games will be reviewed case-by-case and multiplayer games will stay multiplatform (Eddie Makuch/GameSpot)

Eddie Makuch / GameSpot: Xbox EVP Matt Booty clarifies Microsoft's new exclusivity strategy, saying new games will be reviewed case-by-case and multiplayer games will stay multiplatform — Today's Xbox Games Showcase was the first under the leadership of Xbox CEO Asha Sharma, who has pledged to…