Do you think that it is worth getting a ps3 if I already have an Xbox 360 and Kinect swell??????

You can make this decision yourself. Look at the games. If you want them, then yes. If you don't, then no.

Maybe???????????

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How else are you going to play Yakuza?!

Kinect? Pfft.

I say no, the ps3 and Xbox are too similar to own both and, while the ps3 has a lot more exclusives most of them are shooters and the 360 has more than enough of that

Well, how bad do you want the exclusives? Do you need a Blu-Ray player? Would PSN be a preferable alternative to Xbox LIVE? Answer this stuff and you've kind of got your answer.