There been a number of good emulators produced for the Xbox One, but Microsoft has pulled them from the store.He has even managed to get together some .appx files for those that have not gotten them already on their HDD's for when they were available, sadly most tutorials require you to at least spend $19 for an Xbox One developer account before you can install the .appx versions of the pulled emulators, but at least for now it seems to be solid way to keep enjoying apps that Microsoft has removed.
But now Wiired24 has written up a series of tutorials that shows you how you can still keep enjoying them after they are gone!
For more info check out all the tutorials which are all identical, except the one for the NESBox which relies on the browser from the GBATemp link below:
NEWS SOURCE #1: Xbox One Tutorials (via) GBATemp
NEWS SOURCE #2: Il est toujours possible de profiter des émulateurs (via) Logic-SunRise