"No electronic devices"

On my flight tonight from Pittsburgh to Philadelphia (on an Airbus 319), I noticed something new. Next to the "fasten seatbelt" sign, instead of a "no smoking sign" (which has be obsolete for some time), there is now a "no electronic devices sign," which goes off after 10,000 feet, and goes on again during landing.

I've seen two articles online over the past few years about this (by the same author). Ultimately, it's not really a big deal, but it's nice that the indicator light is getter some use instead of none.