I need to use high-definition images in my QML application, so I wrote my own image provider http://pastebin.com/wxBhEGwZ but I see some drawbacks:

1. It's not native in QML
2. I have to specify image size for every image (as high-definition image is not automatically scaled down, so it's twice as big as it should be)
3. My detection isn't universal as you can see from the code (it works well on all iPads and all Android devices we currently have, but it should be more universal as a new device may come that will not be high-definition, but will pass my detection as high-definition)

There should definetly be support for high-definition images in QML itself.