Game Dev Tycoon custom hard ware

What if in GDT you could add custom hardware not only game consoles but like head phones and keyboards and you might be able to sell merchandise like t-shirts and other things. What custom hardware and other things would you add?

You can…l you haven’t progressed enough to make a AAA game. During development you can make accessories

Those hardwares in AAA games only generate hype for you. So it is not like useful except for better hype.