I've been messing around with a Leap Motion device lately, and while I was initially skeptical, there are some actions which are genuinely more pleasant than using a keyboard alone.
Sure, it may not be ideal for everyday computing, but it can be great for specific scenarios. Think a presentation, or something that has less frequent interactions than surfing the web.
If you currently have a Leap and you're interested in joining the private beta to provide feedback that will help us hit the mark, I encourage you to shoot me an email at kmitchell@leapmotion.com.
The most recent commit to leapjs on GitHub was 7 days ago, and Wikipedia says they raised $30 million in January of 2013. Take that for what it's worth, but as far as I know they are doing just fine.
I think Leap Motion is great, but I think that same kind of sensing can be achieved through lower tech ways, like a multi-color glove plus a webcam.
It is a cool idea and I hope they succeed, but I'm working on the low-tech LEAP idea and I'd like to see how far that can stack up to their more complex system.
I would be interested to hear more about the low tech ways, but I don't find Leap to be overly complex. There is a lot of math if you're on the developer side, but I think you need that level of complexity to be able to customize it for whatever your needs are.
Sure, it may not be ideal for everyday computing, but it can be great for specific scenarios. Think a presentation, or something that has less frequent interactions than surfing the web.