Thales have a pretty cool looking system called Eurocat-T. I believe they are supplying to the UAE.
Scroll to the bottom of the page in this link and check out the video.
It's the only one I've seen that still allows the use of "pens" and gestures.
How it works in practice of course could be another thing entirely. Anyone here using Eurocat-T?
Thales's Media: 2010 in motion. ATC Amsterdam 2010
Hope that helps.