This will never happen and if it does , I am gonna switch....
Why ?
iPhone 4 introduction + iOS 4 = almost every app got updated to support super sharp resolution screen by the time iPod Touch 4G was launched.
iOS 5 launch = Same , almost every app took advantage of its features like "open in..." or "iCloud" support etc.
iOS 6 launch - Almost every app got updated so quickly to support iPhone 5 display , maybe very very few apps are left out.
iOS 7 - same
iPad 3 launch - same
Almost every iOS launch is like a party in appstore or even new hardware release...........because developers take advantage of new features of new OS version.
Now , contrast that with Android or WP8..........you will find huge difference.
for example , kitkat made changes in the way which apps can use "micro-SD" slot , if developers update their apps , then only micro-SD card can be used properly.....even today maybe 40% or 50% of apps support it.
Lot of apps don't support 1080p on WP8 natively , they just scale up/blow up 720p versions. its just very rare on iOS.
Lumia 1520 launched like ages ago , where are updated apps ?
What's the proof ? Microsoft themselves are the proof here :
View attachment 62432
link :
Facebook | Windows Phone Apps+Games Store (India)
(look at who published facebook app , its MS)
What's the use of buying Lumia 1520 which has 1080p display , if you are going to run 720p blown out apps ? it doesn't make any sense.
This is the big difference between iOS and rest of the platforms.
EDIT : I used both WP8 and Android platforms for atleast 7 months before switching to 5s