I think you'll want to talk to Apple Developer Relations and see if they can put you in touch with the teams responsible for the GPU-level stuff. We as the browser team can't do much with this feedback.
A few years ago, I tried my hand at making an HTML5 application using the apple-mobile-web-app-capable, apple-mobile-web-app-status-bar-style, apple-touch-icon-precomposed META tags and the apple-touch-startup-image LINK tag.
It was so slick how the iPhone put my webapp's icon on the home screen and had a very beautiful startup splash screen as well. It felt very native and I could feel Jobs' influence on the way that presented, especially because it reminded me of his original iPhone reveal where he hinted that one would write apps for the iPhone using HTML5 (this was prior to the appstore.)
Ultimately, I had to give up on offering my webapp as a homepage app because of differing behaviors of my page in application mode versus in Safari.
For one, if the user switched applications and switched away from my html5 application, it would fully unload. Whereas the same web page would only pause/suspend if safari lost focus (I assume this is iff there is enough memory to keep the tab alive/passivated, which is of course reasonable.)
I can't have my webpage unload/reload on focus changes because it's a single-page webapp and keeps a lot of transient state.
Second, if I recall correctly, there was some oddities about the browser chrome that differed between application mode and safari mode whereby you stole some extra screen real-estate in application mode with an opaque bar and I needed that space for my layout. This second issue I think would be already addressed because your devices post iPhone5 have larger screens.
It would be so neat if these limitations were lifted on HTML5 applications and I could offer it to my users! Are there new/recent improvements to the system that you can share with me? Are there any super secret toggles I might add to my meta tags to tell the iPhone to preserve my HTML5 app's context as aggressively as Safari?
Thanks for talking even though people here are dogging on your proposal!
If you can share any history or stories about the origins of that feature landing on the iPhone, I would be grateful. I find it all fascinating.
Windows has done an awful lot to make itself more attractive to developers recently because they get that it is vital for their future. I hate Windows but, even I have to admit, it has got way way better.
Apple's decision to stop producing things like AirPort Extreme or monitors is a stupid decision in the long run too. Even if these don't make any money on their own, part of what makes Apple an attractive platform to people is that they can buy everything from Apple and it work together so, even if these lose a bit of money, they make sense to do.
There are an awful lot of reasons to not use Mac OS so, it has to get the reasons to use it right and, it is quickly losing them. Fair enough, most of their money comes from selling iPhones but, sales of these will be seriously harmed in the long run if Apple can't sell other systems that integrate well with them. For example, Microsoft would not have to port or update Office on iOS if there wasn't the possibility that it could weaken their hold on the market if there was a Mac and iOS Office alternative. As it is, they would be insane not to support it on iOS but, without Mac OS and Macs, not doing so would be an option and, it would be a serious selling point for Windows phones. Apple's strategy is seriously broken and, it is going to be a serious problem for the company in the long term if it doesn't fix it soon, if it isn't already too late.
I don't say it is already too late, I say it might be. That may be overly dramatic but, unless you refute that there is a problem with an actual argument, you are hardly arguing against that.
The HN echo chamber is strong, but its silly anecdotes don't reflect reality.
What I don't think they did is sell many to developers or programmers. Although small in number compared to the overall size of the market, Apple's losses there are important. Mindshare matters when you're talking about the people you expect to build the software for the platform you sell.