Well, as we can see Avid is moving apart from Software locked to his Hardware. First was a half step Media Composer and MXO2 Mini in April. Than Pro Tools 9 – now completely independent on its hardware. Last Avid DS 10.5 which is impossible to run on Avids own DX harware and you have to use Aja Kona 3.
I feel and I think, the next step (the Second Halfstep) will be completely independent Media Composer in 2011 as we have seen in 2010 with pro tools. And this new Matrox MXO2 shows us that company do work hard for that future.
Last version of MC5 is now able to capture to DNxHD on i7/W7 laptop using the Mojo DX.
I guess the MC 5.5. or 6 will enable capture to DNxHD via any Aja/BM/Matrox Hw and it will depend just on power of your computer.