Not massively, but I am curious. With current console hardware pegged to Dx11, Dx12 is likely to go the same way as Dx10 - largely ignored.
At least the Xbox One (and presumably PS4), goes beyond D3D 11.1, perhaps even 11.2 -- how much further is the stuff of NDAs, but it could be entirely possible that DX12 doesn't introduce new required hardware features -- it could just be a more-efficient API for accessing the existing features, and with possibly some additional non-required features. They did away with CAPS bits, but there are still mechanisms for having optional features.
At any rate, OS support will end up being the driving/detracting factor anyhow, more-so than whether the console supports it.