UPDATE 12TH JUNE: You didn't throw away your old Xbox discs did you?! Quick, go find them in your local time-warp video game store, because old Xbox discs will work in Xbox Ones. Not only that but digital licenses will carry over and you can system-link across all three generations of console too.
Your original Xbox discs will work. Digital licenses will carry over. AND you can system-link play across all three generations.— Albert Penello (@albertpenello) June 12, 2017
Wow Crimson Skies in system link between an original Xbox and XB1 S! pic.twitter.com/Iv6WdBEW1w— Peter (@Holo_drone) June 12, 2017
ORIGINAL STORY 11TH JUNE: Microsoft has announced original Xbox games are coming to Xbox One as part of an extension of the backwards compatibility feature.
Xbox boss Phil Spencer took to the stage during Microsoft's E3 2017 media briefing to announce Crimson Skies as the first OG Xbox game to come to Xbox One.
Spencer said OG Xbox games will run better on Xbox One, as you'd expect. The service rolls out later in 2017.