@nnodley,
It doesn't seem like Microsoft has, at least there is nothing to confirm it has thus far.
It shouldn't come as a surprise though, Sony i think was more ready for the next generation to begin, as we saw with the early reveal in february this year, also Sony is a hardware company so it's only logical that they'de be more ready for the launch of a piece of hardware. Same reason why the PS4 is so small while packing even more power than the Xbox One.







