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".

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.