Hi,
I'd like to add my vote for this too. My new Lenovo ThinkPad has a 3K HiDPI display set to 200% scaling. HiDPI definitely seems to be becoming more popular now what with the Microsoft's own Surface Pro plus Lenovo, Dell, Toshiba, ASUS and various others offering HiDPI displays on their laptops, not to mention the new generation of 4K monitors getting more popular by the day.
As a stopgap, I'm finding that the apps that do pixel-doubling work better than those that don't do any scaling other than text. You can see the pixels, sure, but I find that this is much more usable AND it looks better than the non-scaled, tiny, often distorted UI. Take a look at the following screenshot (click "view original" to see full size), which compares Rapid Environment Editor, which does pixel doubling, with WinSCP. You can see with your software, some of the small icons are unusably small:
<invalid hyperlink removed by admin>
Scott Hanselman wrote a post about the problems with HiDPI on Windows just over a year ago:
https://www.hanselman.com/blog/living-a-highdpi-desktop-lifestyle-can-be-painful
Things have improved a fair bit since then. Most of the problem software he mentions in that post has been fixed (apart from SQL Server Management Studio, which is so bad I'm having to use Navicat instead).
Charles