From what we can see atm it appears the PS4 will support games written in C#. We are now trying to find out how to get a dev kit.
As for the Xbox One, we are still waiting to hear what MS are planning to do about Indie support. There is no concrete information at this time.
We all know MS have dropped support for their XNA API which is the software behind XBLIG.
We do not know yet if they plan to release an alternative or what their plans are regarding this API.
There is an open source project called MonoGame
which replicates the XNA API and supports multiple platforms. So far it appears the PS4 will support games written in C# and MonoGame.
If we port TM to MonoGame, then TM can be released on the PC and (hopefully) PS4. It also gives us options for other platforms.
MS have announced they intend to continue to support the Xbox 360 console for another 5 years.
Updates for TM on Xbox 360 will continue.