Prior experiments were exactly that: experiments
In late September, word got out that Microsoft was testing cloud streaming of Halo 4 to Windows Phone and PC. Speaking about this internal prototype with Polygon, Xbox senior director of product management and planning Albert Penello noted that this specific example "worked really awesome," but it's not necessarily a sign of things to come for those wanting backwards compatibility of Xbox or Xbox 360 titles on Xbox One.
"[Cloud streaming is] really cool and really problematic, all at the same time, insofar as it's really super cool if you happen to have the world's most awesome internet connection," Penello said. "It works way better than you'd expect it to. So managing quality of service, the tolerance people will have for it being crappy. Can you imagine, in this day and age, with the bad information around, and we can't control the quality of that experience and make sure it's good, or have to tell people they can't do it?
"It was a grand experiment, I know we did a lot of work behind it, and we said this is one of the things where the network just has to get better before we can do it," he said. "When that happens, you're going to have a really interesting conversation around that, can I actually run Xbox One games that way as well."
Speaking about the Sony's backwards-compatibility solution -- letting users stream PlayStation, PS2, and PS3 games from the cloud to PS4 -- Penello said that he'll "be really interested to see how our friends in the Bay Area deal with this problem. But I can tell you, it's totally possible. We like it, we're fans of the cloud. We're not shy about that."