Rails is just very high level. The comment on meteor makes it clear why a Rails didn't exist in JS-land. Because the fundamentals are so dynamic and so in flux it becomes hard for a high level framework to gain traction when it can become outdated so quickly (though meteor was a particularly incompetent try at it and that's not the only reason for its failure). Once the community grows a stable low level stack then a Rails-like will inexorably emerge imo, but I have a feeling that React is not at that stage yet.
I don't think a Rails equivalent will ever appear on Node.js simply because JS doesn't have a standard library. Rails stands on the shoulders of Ruby's excellent standard library. The two languages are also poles apart in terms of the quality of design. That is always going to impact any JS framework.
