Earlier quoted context omitted.
High-DPI doesn't work in Windows (officially it does work, but if you try it you'll find that every app is broken), so that's effectively an unsellable product.
Really? I find that it works significantly better then the crazy Apple approach. Not a single problem with it.
Windows' approach is by just upscaling each window, which makes things blurry.
Linux' approach is by letting you set the DPI in dozens of config files (eg one for GTK+, one for QT, ...), but at least the end result looks "reasonably" what you want.