The point is that it's not an iOS feature, it's an iPhone feature. The original question is about the operating system, not the hardware. This distinction doesn't matter much for the iPhone, but it certainly does for Android devices.

Ultimately, what matters is that the Android set of actual phones you can buy competes in the marketplace with the iPhone line. There's no competition between operating systems per se--this isn't Windows vs. Linux.

I can argue with the HTC incredible that launched with a 252 (IIRC) screen. It's actually a rather similar form factor, and I'd argue that the screen is pretty damn close to the iPhone in overall clarity.

To say that incremental hardware improvements are hypothetical, I think that you have to argue against history on this one.

It's hypothetical that future Android hardware will outpace the display quality of future iPhone hardware for sure. And even if it's likely, the question isn't whether Android will overtake iPhone in the future, but whether Android is ahead of iPhone now.