A practical global shutter for large high pixel count sensors in still cameras is beyond difficult, but a lot of work is being done its really not needed for most still shots, but I'm sure that there are cases where its a issue, as in the lighting issues mentioned.
A big driver is cinema cameras, there are lots of work-around solutions using rolling shutters that almost work. Reading out, resetting, and exposing a sensor at rapid speeds using a electronic shutter is going to happen for very expensive cinema cameras hooked to very fast computers at first. With electronic shutters, the sensor is always exposed to light, so, all the photosites must be reset at the instant the exposure starts, and readout instantly after the exposure ends. How to achieve this is the issue. How do you change electronic shutter speeds from 10 seconds to 1/8000 second while a mirrorless camera is still exposing the sensor and feeding a display in real time? With a rolling shutter, the display is frozen or blanked out while the actual exposure is happening, then it goes back to the standard readout speed required for the lcd or evf.
We see patents for various aspects of a workable global shutter camera, and some global shutters exist for video cameras where the shutter speed stays in a constant or narrow range and lighting is well controlled, but getting to work for awide shutter speeds and very low light is far far off. For video its coming first.