Research your idea. See if there's a demand. A lot of people have great ideas, but they don't know if there's a need for it. You also have to research your competition.
Did Muddy Waters play an acoustic? Well of course he did. But did he turn his back on being able to plug it in and play louder? No, he plugged in and turned it up and got miles and miles ahead of the game in one fateful act of just plugging in.