Well, if you have not seen this yet, take a look at the Siftables . I am always skeptical to presentations like this, but despite the worth of this particular solution and technology, I think this proves that, with some good design, it will be possible to find infinite applications where tangible interactions are suitable and superior. I am looking forward to what good designers can do with this and similar technologies in the years to come. Advanced technology does not always lead to complex interaction!
Interaction Design, HCI, Philosophy of Design, Technology and Society