Digital Foundry vs Xbox One backwards compatibility

Digital Foundry:

Right now, as you might expect from early preview code, the virtual machine works and the fact that it does work is simply astonishing. However, as impressive as that is, there are a number of issues. Looking at Mass Effect in particular, we can't help but wonder whether the current CPU virtualisation is as fast as it should be. Clearly there is more work to do, but with a full release due later this year, the engineers still have plenty of time to polish things up. Even considering its current flaws, the state of the virtual machine's capabilities is remarkable: those precious few moments when performance actually exceeds the Xbox 360 gives us just a bit of hope that in the long run, we may actually end up with an improved experience in some games. While we don't know to what extent the current virtual machine can be improved, we'll keep an eye on the progress of this remarkable new feature and report back with our findings in the future.