BioShock is coming to your iOS device - well, if "your iOS device" is an iPad Air, iPad Mini 2, iPad 4, iPhone 5S, iPhone 5C, or iPhone 5 - but if you're wondering just how well the city of Rapture translates from the big screen to the small, you might want to check out the above video from AppSpy.
Comparing an Xbox 360 version of Irrational's underwater tale of genetic modifications and science gone wrong with footage of the iOS version, AppSpy illustrates the visual differences between the two and notices that, despite the power behind some of Apple's latest devices, the visual downgrade is a noticeable one. Lighting, particle effects and atmospheric effects like fog are the things most obviously missing, but textures appear a bit less crisp on iOS as well.
Still, there's time for these things to change, so who knows what the final product will look like. In the end, it'll be your choice which system to go with.