Standard dimension for monitor and photo

We are using monitor for different purposes: mobile screen, computer, television etc. But there is no fixed dimension or ratio. Simply think about a mobile phone monitor. Sometimes it is too large or sometimes it is too small. As the manufacturers failed to reach agreement, we are being harassed for this. Both users and website/applications developers are being disturbed. Here a standard dimension for monitor is proposed. Remember, it is the dimension of screen, not of device. And all screens must be of 3:2 ratios.  All video recordings, TV channel broadcast, movie making etc. will follow 3:2 ratio.