This. Node.js and Rails are sexy right? Show your boss how. Do a video screen capture of the time savings you get. Also, execs like what we used to call "The NASCAR Slide™" - which is a presentation slide with all of the logos of companies who use those technologies. The more Fortune 500 companies, "the faster your NASCAR car goes".
Note - Be prepared to have the ugly discussion around support and ecosystem. These are arguably the biggest cons to "newish" frameworks. The problem for any technologically lagging organization is that they don't have the resource (both human and capital) to support change.
A screen capture sounds like a very good idea, as a nice way to visualize. People tend to buy based on emotions, and then rationalize with logic. The screen capture sounds like an appeal to emotions, while "the NASCAR slide" would work as justification.
The "NASCAR slide" can also appeal to emotions, as a form of peer pressure. "Oh I wanna be like the big guys, and the big guys use this, I should do what they do".
You'd be surprised how often competitors (let's say BP and Shell for example) make purchasing decision after discussions at user group events, simply "to keep up with the Jones's".
Pro Tip - Just give them his link http://www.walmartlabs.com/
Note - Be prepared to have the ugly discussion around support and ecosystem. These are arguably the biggest cons to "newish" frameworks. The problem for any technologically lagging organization is that they don't have the resource (both human and capital) to support change.