Universal or standard pattern of keyboard layout design

One of the arguments for having different keyboard layout designs is that they are tailored for different devices and their usage. So for example, a physical keyboard layout is often similar on a smartphone with a physical keypad but can vary when it is on a smartphone with a soft keypad. Sometimes UX designers will also create variations of the keyboard layout for devices of different display resolutions, such as the split-keyboard layout for tablets, or number keypads when only numerical entry is required (e.g. pin number).

Another interesting factor is the very slow and gradual uptake of alternate keyboard layouts like Dvorak and Colemak that introduces more efficiency and less strain on the hands, which has prompted the increase of virtual keyboards that map these alternate layout onto the physical keyboards.

With the trend towards same user interface across devices (cloud or browser based applications leading this trend), I was wondering if there is a standard being established for keyboard layout that is intended for all devices, or whether there will continue to be a divergence of layouts as long as the current separation of mainstream devices continue (i.e. desktop, tablet, mobile).

My question: is there a standard keyboard layout designed to work across different devices and work environments? Or is this too hard to do because of all the variations of devices and use cases that needs to be catered for?

Perhaps it won't even be necessary if conversational interfaces become more popular, or if the prices of virtual keyboards come down (e.g. those that use visual and tactile sensors to process input).