Somewhat related...
This is the actual description of how Xbox One players are supposed to play Fallout 3 once Fallout 4 launches, with the pre-order bonus being a download code for Fallout 3:
Read this:
"Bundle Description:Bethesda Game Studios, the award-winning creators of Fallout 3 and The Elder Scrolls V: Skyrim, welcome you to the world of Fallout 4 - their most ambitious game ever, and the next generation of open-world gaming. For a limited time, pre-order Fallout 4 for Xbox One and receive Fallout 3 on Xbox 360. The code for Fallout 3 will be delivered to your Xbox message center in 7-10 days. Redeem your code on Xbox.com or on your Xbox 360. Fallout 3 will be included in Xbox One backwards compatibility access when made available. For more information on pre-orders, including how to cancel, please visit http://www.xbox.com/pre-order-faq."
lol. It's impossible to tell from reading that, when Xbox One players (myself included) will actually be able to play Fallout 3 on our consoles.
edit: Whoops! Sorry for double post!!
Unbelievable.