Thank you for the question, John.
Unfortunately, we have not tested the WinForms suite on a tablet OS, but now that you have brought it up, we will do our best to do so. I am confident that the products will work properly, but nevertheless we will run them (together with our ASP.NET suite) to make sure that we are good.
Hopefully, our community will also share their experience with us on this. Feel free to test them and give us your feedback as well.