However, it’s still too early to confirm anything.
Here’s what Frank Savage from Microsoft had to say to an anonymous audience member of Microsoft’s Build developer conference about playing older Xbox 360 games on the Xbox One
AUDIENCE MEMBER: Are there plans for an Xbox 360 emulator on Xbox One?
SAVAGE: There are, but we’re not done thinking them through yet, unfortunately. It turns out to be hard to emulate the PowerPC stuff on the X86 stuff. So there’s nothing to announce, but I would love to see it myself.
Via Kotaku Australia