Had Henry Ford run his company like Apple, the Model T would have been reduced to a glorified wheelbarrow.
At some point "minimalist" reaches a minimum and can go no further. Kinda like a reverse Moore's Law.
At some point, there will simply be a clear piece of glass-like material, no buttons and no case, just a transparent screen with a hologram display.........................
...and be unaffordable to the the general population.