Hay have a look at this the first industrial software to fully support multitouch

http://www.copadata.com/en/products/automation-solutions/zenon-hmi-scada-applications-with-multi-touch-on-the-operator-panel.html?PHPSESSID=255ce7485b56608baf828e9bd4bef cf5

Also looks like they will be a market leader for some time, just spoke to a siemens rep and he says it will be several years before they can do this

Looks very cool