What is NESbox? It is a multiplatform emulator of video consoles. You can play your favorite NES, Super Nintendo, Sega Genesis and GameBoy Color/Advanced games on any computer working under Windows 8.1/RT/Phone or directly in the browser. Nesbox Emulator brings you to the magic world of games of the XX century.
— NESBOX (@nesboxcom) September 12, 2016
Use THIS LINK to play the Nesbox emulator on Xbox One via the Edge browser.
We have independently tested and confirmed that this process works. With OneDrive support also in the works, I guess this is the next best thing if Microsoft wouldn’t allow the app on the store.