Rick,

I can see a number of uses for the product you describe. For the projected cost and projected feature set this seems like an item I can equip each of my techs with. While as others have pointed out there are devices that will (likely) do each of the functions you device does better, I'm guess that most of them, including the Extron mentioned above, cost considerably more that the total cost of you item.

I carry a Swiss Army knive with me. It doesn't do everything, and doesn't do anything better than the purpose-built tool I might use to do the job. However, if using the Swiss Army knife to screw in a wall plate, strip a wire or whatever saves me steps or an entire service call, it's a valuable tool.