I've had a Windows slate for 5 years, now it has Windows 7 on it. Any NEW "Windows Tablet" news is just marketing fluff to me.
Your user-case is in the minority though, it isn't appealing to the rest of us.
Since getting my iPad, I haven't gone a day without fondling it some more. Styluses just don't work, and the Windows GUI (and by extension, legacy Windows programs) also just don't work for this form-factor.