We're always interested in furniture that serves more than one purpose -- it's often a good way to save space -- but we rarely have any real use for it. Our place is small, but we don't need a dining room table that doubles as a futon.
However, this Trio Sofa is in a different category altogether. Assuming it's comfortable, we'd buy it tomorrow if we could.
We sit on the couch. The Trio, with its various movable hard surfaces, doubles as a desk. It's perfect.
If we had the Trio, we never would've needed to buy the desk. In fact, as Treehugger points out, if we had the Trio we might never need to get up again.