MICHALECOLE posted...
didnt they do that already with the Wii?
Kind of. Wiichucks offer a lot of similar benefits to Joycons (namely that you can hold your hands wherever you want), but functionality-wise they're missing out on a lot of things that keep them from being fully functional as a modern controller (even by 2006 standards, which aren't overly different from what we see today). With Joycons, you've got everything a regular controller would have, but they're completely split.
That came in really handy when I broke my elbow a couple years ago and had my right arm stuck in a sling for two weeks. Instead of trying to hold a regular controller awkwardly off to the side, I was able to use split Joycons in whatever position I wanted and experience only a minor downgrade in the experience. I hadn't previously considered the accessibility angle of it, but it's actually kind of a huge deal. In the same vein, there are 1-handed Joycon grips out there that are literally just an L-shaped piece of plastic, allowing both Joycons to be held and used by players that only have one hand available. One-handed grips for traditional controllers also exist, but they're
vastly
more complicated to assemble and use, so kudos to the Joycons for being so simple to adapt.