So, you are saying that there is no plan for it to work outside of Chrom(ium) browsers? It doesn't solve the problem of forcing someone to use a specific browser to use the platform.
It does not inspire confidence in an end product will work everywhere and be of high quality when the product to create it is buggy and limited.
this is something we are going to solve soon by having ability to open up the build url and keeping it in sync with the changes.