Great question.
So in theory: this should work with the version of OSMC you receive. This is because we had the 4K framebuffer on by default. But Kodi didn’t any better, because of the scaler.
@WilliamG also reported an issue, so I reverted the change as discussed here: 3840x2160 UI appears interlaced. I’m happy to revisit this in the near future however.
@anbodearg has purchased a device and it should be with him shortly. The software he receives should be old enough that he will have the 4K framebuffer enabled. Maybe he can test his photos and see if they look improved before updating
Sam