I've been thinking the exact same thing. They have the Decklink Extreme 3D and the Decklink 4K(coming soon). I already have several Decklink Extreme cards and I was planning on getting two Decklink 4K cards depending on what the BMCC outputs through sdi. I need to be able to film upwards of three hours raw/uncompressed non stop using multiple cameras, so recording to a 512GB ssd is not an option.
It just makes reasonable sense to enable 2K output from sdi. I would like to see the BMCC output 2.5K and/or 2K at 12bit 4:4:4 through sdi... this would easily be captured by the newest Decklink cards. If Blackmagic would make 2K 12bit 4:4:4 output through sdi, I'd purchase several BMC cameras and two Decklink 4K cards.
My Wishlist:
1) Output 2.5K, 2K, and 1080p at 12bit 4:4:4 uncompressed through sdi
2) Output 1080p Raw
3) To be able to output Raw through sdi ( I don't know if it's possible but that would give an alternative for those of us who have to record Raw/uncompressed for long hours at a time nonstop).
4) 60fps or higher at all resolutions(2.5K, 2K, 1080p)
5) Micro 4/3 adapter
6) Genlock