Floating point scaling lets you to create whatever size window you want. It adds black bars if you set it higher than your vertical screen res, then it changes window to be wide with bars.
For example I have 1440p screen, so when i scale it to 184% from standard 768p window, this is exactly right (because it also adds window title bar that need is included in 1440p).
Works and looks amazing, no need ahk script.
And if i want run full screen on 4k tv, flawless transition.
I'm really pleased with this new wrapper, looks and works great.