The problem with that is that the players who want to use that feature would constantly need to be using Chromium. I've suggested this exact same thing a couple of times by now, including a spawnable radio but due to GMod being shitty as it is, it made it quite difficult to add properly - Chute did mention a couple of times that there was a way to add it (via some woo-doo magic of his) without the need for Chromium but it's been quite a while and I don't know whether or not he plans to do anything in regards to that anymore.

But other than that, it's a good idea.