I can test the touchscreen capability on my HP TX2 convertible tablet (my main Calibre device). It's on Win7-64. I'll try to install in the next day or two and get back with you on it.
It would be really cool to get working. The icons are big and touch-friendly, so all it really needs is touch-based scrolling and such to become very useful in tablet mode.
"I believe that only scientists can understand the universe. It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong." - Isaac Asimov