Is anyone else upset that gta4 will be on 360?

i am. there is NO EXCUSE for sony to give that game up. xbox has been puting out many games that are for xbox only and it has been good... for them. playstation on the other hand is struggling because of its lack of ps3 only games. if they continue to release games on both platforms, we may never see a playstation 4!!! i know i cant be the only one who grew up loving the sony company for what they had given to the video gaming world. so what is the problem?