I'm not so sure that the need for touch is really that great in a desktop environment. It's probably cool for someone looking over your shoulder and wanting to take control of your computer. But for sitting at the computer and making something happen... I don't think the usability needs to be 'equal'. And in the desktop world it should favor the keyboard/mouse.

Here's an anecdote for touch vs. mouse/keyboard:

Pretty sure I'm not - nor is my family setup - typical of a windows user. We have two touchscreen desktops in our house.

I have a two year old that can work the touchscreen very proficiently. My 5 & 7 year old stick with the mouse and never use the touch, I almost never use touch, and my wife rarely uses it.

Based on my personal observations, on the desktop, touch is good for very new users or those who lack the physical coordination to control the mouse and keyboard. Otherwise, mouse and keyboard wins.

The Windows 8 mouse experience is really lacking at the moment. I expect that gets a major update in the next version.