IBX-100 - concepts
The retail sector.
That's right. Sales. You could create (or get somebody to create?) some sort of rolling demo, maybe with software like NoticeBoard by The Really Good Software Company. You can plug the thing into a television, boot from the Zip disc. With a bit of careful planning (or maybe RAMFS) you should be able to boot several in turn using the same Zip disc, then leave the disc unattached and the box(es?) running to loop the demo forever. The box consumes, what, 9W? That pales in comparison to most TVs. You could run one for less power than an energy saving light bulb. :-)