You can deploy on Windows 10 with MDT?

Short answers:

Yes, you will we be able to deploy Windows 10 with MDT.

In a very general sense, you COULD use an existing task sequence, swapping Windows 8 for Windows 10 at the “Install Operating System” step. But you will need to test it and see how it goes. I usually recommend creating a new task sequence instead of modifying an existing one.

You DO need to update the Microsoft Deployment Toolkit in order to deploy Windows 10:

• If you are on MDT version 2013, you can follow an unsupported process to get Windows 10 deployment working: http://blog.westmonroepartners.com/make-the-microsoft-deployment-toolkit-mdt-2013-able-to-deploy-windows-10-windows-server-vnext-and-hyper-v-server-vnext-technical-preview/
• Microsoft is working on a new version of MDT (version 2013 Update 1) that will be fully supported for Windows 10 deployment. However, to transition to it, you will need to install the updated ADK for Windows 10 and make additional changes to your environment.

I would recommend applying the unsupported workaround in the blog post above. Once Microsoft releases the final version of MDT 2013 Update 1, you can then transition your MDT environment to it.