Since this is a site that actually revolves around everything start-up, I feel the need to mention that there might indeed be a market for this. The Optacon fil

Since this is a site that actually revolves around everything start-up, I feel the need to mention that there might indeed be a market for this. The Optacon filled a nieche that currently nothing else does. A portable, relatively affordable generic tactile graphic display. While we have OCR these days, things like layout and handwriting are still a major issue. There are problems that are pretty much unsolved in practice, like OCR'ing math formulas and have them present in a readable tactile way, which the Optacon solved for those people motivated enough to deal with it. A modern Optacon would still have the nice small camera, but likely also a "terminal mode" which could be used to explore the content of your computer screen, using the camera as a sort of mouse. If you manage to design something that is reliable, and matches or surpasses the Optacon in practicability, you can expect to charge around $5k for it and it should be a success (as far as successes in the assistive technology market go). I should probably mention that this has already been tried around 2000. The product was called VirTouch and was made by an israeli company which name I forgot. Unfortunately, they never really went into mass production, the company somehow went out of bussiness before the product went out of demo mode unfortunately. However, I still think this could be pulled off if done right.