The double din car stereo has come a long way since they were first introduced, are continuing to evolve and add more functionality all the time. From the basics of listening to the radio, they have become much more than an entertainment system with many now offering the ability to use them as GPS navigators and connecting your phone to make calls with.
Not only do they have great screen real estate (usually around 6.5”-7.0") many of them are also touch screen, which makes it a lot simpler to control whilst driving. Compared to fiddling with nobs and dials, you just need to press an on-screen button or two to do the same thing.