It's the lack of subpixel anti-aliasing (aka ClearType). For some reason it's being erased from a lot of modern software. It's why Windows >= 8 UWP apps and GNOME look so blurry.
It's just another example of why developers shouldn't be given the fanciest tech available (in this case: high DPI screens) so that they have to experience how actual users see their software.
Something wrong with my eyes? Doesn't cmd.exe look smoother in this screenshot?