Improve filtering and text readability for high res desktops by using mip mapping

Or a pixel shader to super-sample multiple texels of the desktop texture while doing distortion on your own.

I know mip mapping is supported but it's rift only.

But I really want "best in class" sampling to improve readability. As soon as you cross a threshold away from the virtual desktop, text becomes unreadable. This is not because of resolution but because of aliasing artifacts.