Is it coding based? If so, it falls in to a totally different market than Construct 2. There are loads of coding libraries out there - you still have to code, though.
Develop games in your browser. Powerful, performant & highly capable.
That demo is as buggy as all hell, too.
Though, still kind of neat. I bet some folks will be all over it.
Far more development with Html5 in its infancy, than there was for flash in its early stages.
Makes perfect sense with Html5 being a standard rather than a proprietary.