Rui Carmo, on taoofmac.com:
I’m a bit weirded out by this, but, overall, the multitasking UX on Windows is actually better than on the Mac for me right now.
In all the review videos, this is what makes me both curious and envious. Mac window management is stuck on the Snow Leopard era. With smaller screens and less powerful multitasking than we have now.
Just like with other Windows windowing features, I hope 3rd party apps implement them soon.