Who knows what tech projects lurk behind closed doors at Microsoft? Long Zheng knows. Actually, so do the people behind the closed doors, but we don’t hear from them much. ;) Long found this interesting video demonstration of a multi-touch notebook display that effectively simulates Microsoft’s Surface computing project, only it does so in a very preliminary way and is cobbled together with sensors on a standard notebook. Well worth watching this develop as that rodent most of us have attached to our notebooks could be exterminated if multi-touch potential is reached. What’s interesting is a unique difference between Microsoft’s multi-touch approach compared to Apple’s: what we’ve seen so far from Microsoft requires infrared sensors and cameras in general, while the iPhone appears to use two true touchpoints from what I can see.