Hi all,
I’ve discovered that multi-touch support for touch screens is in fact not supported for Windows 8. As it stands this appears to have been pushed back to 4.9, but I can’t guarantee that it will occur then, either. I will update the issue regarding it with this thread and the other ErcanShamansoft linked above asking for touchscreen multi-touch support so that developers know that it is something being requested by the community.
Thanks!