It says

Can the iPhone ever have too many “physics based” games? Apparently not.

and rightly so, for two reasons,

1. Physics games are *supposedly* more fun
2. They are the silver bullet for many that do not know how to create games the traditional way.

I am not taking a dig at anyone here, so please do not misunderstand these points, but if you do want to understand exactly what I am trying to state, you can read about it here .

Physics games are more addictive, in what I have seen.

They are also easier to pass to a friend (easy controls and no story-line to get the hang of) which means easier advertising