[mrpippy]

Win 10S can run desktop apps that have been "converted" using the Desktop App Converter (nee Centennial) and uploaded to the Store. This is how iTunes will be coming to the Store later this year.

Currently the only device shipping with 10S is the Surface Laptop, and it can be upgraded to regular Windows 10 Pro for free for the rest of the year. I suspect that step 1 of the Surface Laptop setup experience for users-in-the-know will be to do this upgrade, just like "uninstall craplets" has been for previous Windows laptops.