If there were microdot e-ink tattoos (whatever their equivalent would be in human machine interface systems, anyway) I would strongly consider getting one. You

If there were microdot e-ink tattoos (whatever their equivalent would be in human machine interface systems, anyway) I would strongly consider getting one. You can do a lot with a 64x64 matrix especially if you can change it with a usb powered overlay device or like a laser at a specific light frequency or something.