Originally posted by richard balonglong That handful is a lot. There are hundreds and thousands and more who uses strobes and wanted to eliminate motion blur and/or to compensate better their lighting (i.e. fashion and portrait photographers, sport photographers, strobists, photojournalists, etc...) And that "only case" is a lot of thing for photography.
As I said, eliminating motion blur while trying to balance ambient and flash is nearly the only reason you would really need a faster sync speed, as all the other reasons could be answered by another mean.
In your other examples, a faster sync speed
to balance ambient is needed only if your aperture is fixed and you're already at base ISO, and in this case, using a small ND filter or (even better) a polarizer will bring you beyond the 1/180 to 1/250 speed bump...
Okay, using a filter pumps slightly more juice from your flash batteries, and you have IQ problems if you're using low-quality filters, but I'd frankly prefer for Pentax to let the shutter alone.
Now I could see a use for an electronic shutter option allowing sync speed up to 1/8000... Say, in the Flash menu, having a new option : normal, HSS, Wireless, and
Electronic Shutter.
It should be disabled by default, and be enabled via a Custom option (quite like the "Aperture ring Permitted" option).
I had a bridge some 6 years ago with which I started strobing, and it could sync right up to 1/4000... Quite fun to use!