What about all the other functions? Are they getting affected? If it is an iPhone will my OnTouch function now return coordinates in 640x1136 or 320x568?
Coordinates for 3.5-inch screens (even Retina) will remain 320x480.
Coordinates for 4-inch screens are 320x568.
The only difference will be that the iPhone 5 / iPod touch 5th Gen devices will have 82 more pixels to play with...