Safari needs to implement the standards and offer decent performance, adding on top of that very good integration with the OS and it should win on Apple OSes.
Also Apple users please demand Apple to sacrifice a bit of their profit and offer web developers some way to test their websites/code on Safari(including Betas for free) , either by providing test virtual machines images or some Web Based service. Safari Beta not only requiers you have Apple hardware and OS it requires you update to latest version (you maybe don't want to be forced to latest version).
Effectively, in this case allowing competition will permanently destroy the open web.
Then later Apple decided to change iPad browser to pretend is a desktop, this broke my checks and instead of the 2D version the iPad users got the broken 3D version. But finally the broken WebGl was released on Apple desktops/laptops so now everyone using Safari gets the 2D version.
What we need is a way to test Safari the stable and the Beta, I can find bugs, the guys that made the WebGl library find the bugs before the browser is released etc.
What non standard API only Chrome implements and evil web developers want to use?