Apps like Mint and Facebook exist across the various mobile platforms (namely Android + iPhone). Apple doesn't seem to ban apps that are cross-platform as long

Apps like Mint and Facebook exist across the various mobile platforms (namely Android + iPhone). Apple doesn't seem to ban apps that are cross-platform as long as they're written with native APIs. Now imagine if you took Call of Duty on PS3, and did a hacky port where you stubbed DirectX code for the PSGL calls, and used some common denominator between PS3's online service and XBox Live. I'd highly doubt Microsoft would let this go to market, given how poorly it'd perform. Now imagine if these ports were all automated by a third party layer. In fact, I'm curious to see how many successful games out there use something like Unity to allow PS3/XBox/Wii ports without any code changes.