[noggin]

Actually .... Openelec / Kodi on the RPi now does the highest quality CPU deinterlacing called "Deinterlace" aka Yadif.

I thought the Pi did the interlacing not on the CPU? I would be amazed if that CPU could deinterlace even overclocked.

No - GPU (not VPU) I believe.

The best deinterlacing we get in Kodi is Motion Adaptive Deinterlacing via VDPAU.

Nope again - we get Motion Compensative in VAAPI (which is better than Motion Adaptive), and I think Temporal / Spatial VDPAU is also better than MA.