Actuly I think he has a point about singstar being a important game, at least here in Sweden buzz, singstar and Guitarr Hero is selling PS2. But if he is speaking about PS3 I don't think that PS3 will have any real use of singstar with the heafty price point, when you still can buy a PS2 with almost the same game. I mean you don't need any nice graphics for singstar :) I don't know much about killzone so I wont say anything about that...
Buy it and pray to the gods of Sigs: Naznatips!