Yeah, the site is kind of slow right not but I can't tell if they provide an abstraction layer to various system level API's or not to get access to accelerometers, gyros, cameras, etc. like PhoneGap the other "first open source multi-device development framework" that I'm aware of.
Developers can use phonegap to provide these abstractions where they make sense (mobile).
Another focus of the framework is TVs and connected objects, where we do provide abstraction for media elements like video : each TV SDK (Samsung, Philips, LG, ...) has its proprietary widget