Being unfamiliar with IE dev tools maybe someone that is familiar can key in:
Already google/found an example of a style sheet to disable "double-touch zoom" which was wreaking havoc on long scrolling web pages where I have a tendency for fast scrolling (such as FB feed, news sites, forum pages). Pinch zoom is more than adequate and only zooms specifically when I want it to. Problem solved. I also "complain" with current touch support that "hold-release-drag/select right click menu" (to specify open link in new tab or window) to be ridiculous. Behavior that would remedy this would be a gesture: Hold and release brings up right click menu (as is). Hold then swipe right (without releasing) would open link in new tab, Hold/swipe left in new window. For added convenience possibly swipe up = copy shortcut and swipe down = properties. Since the tap to zoom touchscreen behavior can be modified with a style sheet what about adding genstures? In previous versions of Windows I believe this could be done with flicks customization, but for whaaaatever! reason MS decided we can't use flicks in Win8 unless our screen is a digitizer with a pen. Bad call if you ask me.
I think for future windows releases the dev team in charge of touch support on desktop OS needs specifically to have their KB/Mice/touchpads taken away/disabled. They'd think of stuff like this on their own if they were forced to use touch exclusively. By now people using touch enabled PCs and laptops should be using the keyboard/mouse/touchpad as a compliment to the touchscreen, not the other way around. Its 2015 you know....
Also regarding IE on a touch enabled PC: Metro IE and desktop IE really do need to be sharing cookies etc. I'd use metro IE a lot more if form data/cookies etc. were shared between the two. As it is every time I try to use metro IE I go trough the "yikes I have to look up/copy in some complex password...maybe later...I'll pull it up on the desktop that's signed in already".