While there is a possibility of a market perhaps in remote diagnostic labs and schools. However, there are much simpler and cheaper ways of checking if a PCR has run correctly, such as the standard agarose gel electrophoresis. All this requires is some agarose, buffer, gel tank and trays, and a DC power source. You can also buy things to check the product on a "chip" which is basically a very very small gel enclosed inside a small cartridge (maybe 2 cm each side) that sucks the DNA in and separates it giving you a read out at the end, but it is expensive.
The potential pitfalls of yours is that it will almost certainly be expensive (based on the dye alone), and the presence of a signal doesn't mean that your PCR has worked - you could have primer dimers or off-target bands in the reaction that would give positive signal, but no way of telling if the signal is a result of these artifacts. Also if you are setting up PCR, especially a lot of PCR, then many people use a plate, rather than using individual tubes (imagine trying to label 96 tubes individually...) - is your device capable of handling plates or strip tubes?