While the iPhone can only do two touches, the Dell Latitude XT can apparently do more.  The HP TouchSmart can also do at least two.  Meanwhile, Albatron has announced multitouch LCDs that supposedly will cost only 20% more than regular LCDs.

Are there any limitations to this approach?  Maximum number of touches, lag, force required, anything like that?  While I think what the people in this forum have accomplished is the current state of the art (or close to it), I am wondering what the future will look like.

Hopefully all those devices can be made to speak TUIO so the applications can be used on any hardware setup, whether it’s a webcam, wiimote, tablet, or anything else.

No fiducial tracking , small display size (for the notebooks) , the screens are just prototypes no word on actual production , they estimate 2012 will be the year they produce it ) , we can experiment with MT for years in advance then.
The capacitive displays will probably have a finger tracking cap , something like 10 fingers tracked max , maybe more.
Our curent methods are usable in large displays , the maximum number of fingers is determined only by tracking speed , it can be used for table based systems , wall based systems etc.