I would absolutely hate to be the support for something like this. Doing it myself is fine, making it a paid product? Imagine doing something that either wrecks somebody's expensive several hundred or several thousand dollar TV and now you're on the hook for fixing it. And that's before we get into any of the other annoyances that come with this..."[completely unrelated thing] was working just fine before you did this!!"
Maybe it's a small issue, maybe it's a big one, but what if you can't fix it without physically connecting to it? Are you going to have a plan for doing remote ADB work with them? I get what you're saying, but if anybody's looking at this thinking about commercializing it, I would strongly think twice.