Palm Pilot & friends (back to newton and earlier?) had the same stylus and resistive touchscreen for quite a few years before the DS, and the Palm at least sold

Palm Pilot & friends (back to newton and earlier?) had the same stylus and resistive touchscreen for quite a few years before the DS, and the Palm at least sold millions of units, and they had a cellphone model a long time before the iPhone existed, so it's not like the tech was unheard of or untested or even really that alien. The motion stuff for the wii was a lot more insane and worked out really well, there was no major market product for that stuff prior afaik, so that's a fair point.