MultiTouch is awesome, it provides endless possibilities. As of now not much applications & games support this technology but new apps are coming which uses this power. In this series a new Air Hockey game is being developed which supports multitouch & is multiplayer i.e. two users can play simultaneously on the same device

Sure MultiTouch capability is new to Windows Mobile with only HTC HD2 Leo supporting it through HTC Sense. But some kind of multitouch features are supported on all Windows Mobiles which can be easily implemented in applications. Although this is not true multiitouch but shows some signs of the feature. I stumbled upon on one such application which shows what can be called as MultiTouch & it works on all touchscreen devices.