Because it's true.
Yet, you never provide any evidence nor answer any questions when asked. Those usually mean someone has their head in fantasy land.
Because it's true.
Because it's true.
What does that prove? Anyone can get any engine running on the iPhone/Pod/Pad, but that doesnt mean they magically (see what i did there?) have good controls that dont require your fingers to cover a large portion of the screen. It doesnt magically give the user tactile feedback. It doesnt mean anything other than Unreal runs on the i<device>.
If someone could get Halo 3 running on the i<device> at 60 fps with full online capabilities doesnt mean its going to be fun to play. Its going to suffer from the same problem as Chinatown Wars: console controls clumsily fit onto a touch screen.