The Realforce 108UH-ANLG [1] can also do that and can even emulate the analog sticks and buttons used on gaming controllers. Here's a demo video of one being used as a piano [2]. You can tell that harder keypresses result in louder notes. I don't think it's been released outside of Japan yet but they have some keyboards with customizable actuation points using the same Topre switches [3].
First thing I thought of when I read that line was a keyboard with no shift key. If you want capital letters you really have to MASH THOSE KEYS TO MAKE YOUR POINT!
There is at least one company making analog keyboards, mainly for gaming: https://wooting.io/