Tapered Optical Fiber Screen Extension

One of the cheapest and most useful tools I own is a small length of optical fiber with a shroud on one end that connects to a Maglite pen, with which I can illuminate inaccessable places inside computer towers buried below desks. An even better product than this would be a few hundred thousand hair-thin, tapered fibers bunched together in a flexible endoscope cable that flared out to monitor size at one end, and to a ~1 inch screen at the other. With the big end clipped to the VDU I could work on the BIOS and OS while I was below deck, without diving in and out every five minutes constantly cracking my head against pointy things.

Other possible uses are watching TV or working/playing on the computer whilst reclining in easy chair, bed or bath, or using a smaller version as a cheap HMD for a wearable laptop without all those hideously expensive bleeding edge microelectronics, lasers, and MEMS.