Really looking forward to the touch screen support.
I've become really used to touch gestures, not only on my iPad but also my mac (which I use at work for developing software). I'm still more of a PC guy at heart (although Windows 8 tries my patience at times), and I still like to use a mouse and regular keyboard for some things, but I have to say that the touch gestures can be very expressive and intuitive if you have proper hardware and software support.
Often when developing software I'll switch over to my Windows development environment on my Mac, and the Apple hardware coupled with its touch gestures offered a superior experience then a native Windows one. However some of the new hardware aimed at Windows 8 touch seem very promising and I can say that their tactile experience mimics what I have grown accustomed to, so that's good news.
Windows 8 still has a number of anomalies that I continue to find annoying at best, and baffling at worst, but I'm learning to work around those. Hopefully Microsoft sorts those out sooner than later...