That should be their headline, I didn't get what they are doing the first time I saw the page earlier today.
For example, (picking a random paid app) http://www.amazon.com/dp/B007VUCAVO
You should try to make some kind of demo available for the user without having to do anything except click once.
This made it very difficult for me to understand the concept: I wondered if you were showing me a web app that accessed native hardware.
a popover or floating arrow or something might be a decent way to solve some people not getting it.