The bottom line is this! This is a port, whether it's crappy or not, it's a port. It wasn't in development when the game came out for the 360, so it's been decided once it came out for the 360 that they would make a PS3 version. Yes porting the game would cost money, but the majority of the development costs were for the 360 version and seeing as it sold nearly 2m copies, I reckon they'd have made their money back and then some.
I can afford this game if it comes out at full price, but I along with a fair few other next gen console owners are very picky on what games I pick up and cost is an factor in that as well.
Yes I would love to be able to get LittleBigPlanet, Force Unleashed, Resistance 2, Motorstorm Pacific Rift and Bioshock in the next few months, but I have to be picky as all these games would cost me around £200 (yes nearly $400) and I just cannot justify spending this amount of cash on games. But if a game like Bioshock was released at a budget price, and I mean a truly budget price (looking at the reasoning above), then I would probably get it as it would be a no-brainer. But because of the cost of Next Gen games, I will probably only get Motorstorm Pacific Rift and Resistance 2.
Also, no matter how good Bioshock is for the PS3, I highly doubt it will sell much more than 500k lifetime.
Prediction (June 12th 2017)
Permanent pricedrop for both PS4 Slim and PS4 Pro in October.
PS4 Slim $249 (October 2017)
PS4 Pro $349 (October 2017)