Well, it would be like making glowstone, but using redstone instead. The block itself would act like redstone and carry the charge. (Allowing for more organized/3d circuits) It would also make a Computer monitor really well, going from black to red.
like the idea, but ordinary redstone is more compact/easy to use with. i have an idea for that though, like that block can act as a redstone that can carry the signal further, (like more than 15 blocks) and doesnt delay like repeaters?
Redstone Blocks