Macworld For modern drivers, touchscreens aren’t just a convenience. They’re an important safety feature, especially for those who regularly rely on live GPS navigation to get around. Now, even older vehicles can get an easy and inexpensive upgrade to this tech with this plug-and-play wireless car display. Through March 31, it’s on sale for only $78.97. This crystal-clear touchscreen can pair with Apple or Android phones via Apple CarPlay or Android Auto, giving users access to an array of apps and phone mirroring. For safer control, drivers can use hands-free voice control, which enables them…