Just in case you don't know, you could now play NES, SNES, GB, GBA, GBC, and Genesis roms on the Xbox One by firing up the Edge browser and going to
http://nesbox.itch.io/x1When you go to the page, wait a few seconds for the emu to load itself up, then you can start interacting with it. It uses OneDrive to access your roms, so upload them there and give the emu permissions to access your OneDrive when it asks.
I can confirm that Zelda, Link to the Past works, as well as Mario Kart, but haven't gotten around to trying anything else. The dev who created it (@nesboxcom on Twitter) has included save states and 2-player support, amongst other features.
Quick tip on using the save states, press RB+LB (emulated Start + Select), in that order, to initiate the emu save/load screen. You could bring up the save/load screen anytime while playing yuh game, but there only seems to be one save slot per rom, so use it wisely.
So if yuh see meh on Edge on meh XB1, yuh know is wha!
Came across this nice guide to using nesbox:
https://stormztrooper.wordpress.com/2016/09/28/relive-the-classics-with-this-12-step-guide-to-nesbox-on-xbox-one/edit: corrected the Twitter handle to @nesboxcom and added link to guide