I think developers get attracted to frameworks because of fun examples like the one linked in the posting. Until there are multitudes of interesting examples using other tech, I think it's going to be an uphill battle to attract significant numbers of developers to them.

Since many of the Node.js demos like this one are open-source it's much easier for developers to download working code and make modifications to see how everything works.

The technically superior solutions often get overlooked for the most accessible ones.