Please see Release date for ArcGIS Runtime .NET SDK (Windows Store) on Windows 10? This should lead to a few threads where some of the developers on this particular team discussed this topic. You'll also want to keep an eye on the following knowledge base article.
Is Windows 10 Certified with Esri's ArcGIS products?
http://support.esri.com/EM/knowledgebase/techarticles/detail/45362