So Islam Gomaa , Annur Sumar and Neele Syam Kooli had a session MDC-B401 at TechED North America
Really looking forward to see the new build and play around with it when its released for preview later this month
They key takeway of the public enhancements from my point of view is
DPM is fully supported using VHD/VHDX for short term store meaning we can run DPM server virtual , we can also use Synthetic Fiber Channel in HyperV to use the library between the virtual DPM servers , this is great news.
If thin provisioned vhd/vhdx are supported is yet to be seen but prehaps that can help with the storage usuage when DPM is generous with allocation.
Deduplication is yet nowhere to be found , deduplication of the vhd/vhdx should be possible with 2012 R2 but still unknown what the support will say to it.