Sometimes Scientists are just big kids with lots of discretionary funds.
Case in point: This video shows a chair that self-destructs, then rebuilds itself.
Self-assembling? Why would that be necessary? Well, for starters, think Nanotechnology. Think of molecular robots which are delivered (to the blood stream, for example), and then which assemble themselves into artery-cleaning machines, which either break down or are excreted when their job is done.
Yes, yes, I know. A self-assembling chair and a molecular blood vessel scrubber seem to be nothing like each other… but it is the technology that we learn on a large scale that will help us move into the molecular scale.
Besides, even if all this science stuff is boring to you, a chair that breaks and fixes itself is, erm… pretty cool.