This video gives many cool demonstrations of the potential of surface computing, so thumbs up for that.
However, I predict (and recommend) that many of these functions will come through wearable computers and augmented reality instead. This will offer a three-dimensional experience, which can be made private to the wearer or shared through a network, as well as offering many more services tailored to the wearer's immediate needs and desires (including biofeedback input) than can be offered by hardware surfaces with limited functionality and a display that anyone can see. Moreover, many of the technologies required to begin bootstrapping augmented reality applications are already with us.
I sometimes dream of offering something like an X-Prize for a team that can combine a couple EyeTaps, cameras, mics, earbuds, and an iPod or smartphone into a fully functional augmented reality system. The idea is that using readily available hardware will offer more encouragement for hackers to develop AR software for it. Or, set up an augmented reality wiki, define some hardware and software standards, and let the community go to work, building up from grassroots the way the PC, the BBS, Linux distros, Internet apps, and Firefox add-ons have been created. Anyone interested, please contact me.
We needn't invest in big, expensive, touch-screen monitors masquerading as tabletops, walls, and floors to turn our world into a holodeck.