If someone else can integrate hardware monitoring as well as TDM does, but somehow uncap the DSP limitations of the TDM process cards, that will be the system to beat.
And it likely won't run PT software, which has always had a subpar featureset.
Can you control the hardware montior mix with the included DSP (of MOTU interfaces) inside DP now, or do you still have to go into their Cuemix software to set that up? I think that's the future-effectively a TDM like solution for monitoring, with the mix processing done on the host CPU, so every upgrade gives you more horsepower. Limited DSP included in the audio hardware for use in monitoring. And the ability to split tracks between drives for high rez (one feature that as far as I know, is still unique to PT).