As you may or may not have heard, this week at the build conference, the Windows 8 Developer Preview was released. You can go over to the build website, watch the keynotes (good overviews), and download the ISO files for the Windows 8 build.
I agree with him that the new Metro-style and start screen are great for touchscreens, but are pretty clumsy on mouse and keyboard. We have to keep in mind though that this is an early preview, so we'll see how this ends up in the final product. For those who were involved in the AX 2012 beta program, you know how for example the sales order screen was initially redesigned (short story: it was pretty bad). Microsoft did take the beta participants' feedback and reworked that to something way more user friendly. So let's not scream too hard just yet, there's a ways to go with Windows 8 development.
What I like a lot is the new multi-monitor support. It's gotten better over the years, especially with Windows 7, but I feel like the new features (taskbar per monitor, options for showing all or only windows on that monitor, etc) finally equal what other OSes and third-party plugins have offered for years now.
I've tried to install the AX2012 client on Windows8, but it threw an exception while checking prerequisites. I'll try again later but at least it won't work right out of the box (yet).