Here’s a better look at the two Joy-Cons that will come bundled with every Nintendo Switch. There’s a lot packed into them and they feature HD Rumble, which allows you to feel subtle vibrations. The video they showed was that you could tell how many ice cubes a cup held just by shaking it. They will come in Neon Blue & Neon Red as well.
Also, the Joy-Cons will be able to be augmented with a special attachment that adds a strap and also better access to the L & R buttons.