Having to actually put this on your hand makes it much less convenient for short-burst typing than a touchscreen. You have to take it out, fit it, and be temporarily disabled by it.<p>Using this for typing over long durations isn't more convenient than a keyboard and the friction would probably become uncomfortable over time.<p>I think this will encounter the same problem most wearables have finding product-market fit. The bar is already incredibly high in terms of the speed and ease of use of consumer electronics. If you've added even 1 physical step that adds even a half-second to an action, people will always eventually default to the half-second faster way of doing something.<p>There's also the issue of personal consolidation. People will generally favor a single device that does 2 things over two devices that each do 1 thing, even if the more specialized devices perform better at their individual roles. This is why releasing the iPhone eventually cannibalized iPod sales. I don't see a wearable keyboard justifying pocket space for most people.<p>I actually struggle to find a use for this product even when I get very specific about the use case. If you're rock climbing, you still have to position the screen of the device you're typing on. This product just added to the number of hands I have to use. Even if the screen is mounted somewhere for you, what's the ideal use case? Texting while bicycling?