Microsoft hasn't shown either beyond very controlled demos, so it's hard to say what the state of either is. Windows has been running on Intel a _bit_ longer th

Microsoft hasn't shown either beyond very controlled demos, so it's hard to say what the state of either is. Windows has been running on Intel a _bit_ longer than Tegra (even if you only count x64), so I wouldn't be surprised if the ARM kernel and drivers aren't totally ready yet.