Keyboards are MUCH easier to produce than LCD displays or cameras.
The problem is that there's only so many companies that truly design and manufacture photographic sensors, lenses and LCD panels. And all the downstream "brands" that assemble this technology into cheap plastic cases to sell to consumers can only do so much to differentiate. Add neon lights for gamers. Make it look dull for business users. Etc. They also sell TVs and have thousands of other SKUs, so they really don't care about any individual product.
Apple is both incentivized (due to their ongoing customer relationships) and able to break out of this mold because they:
a) Produce a tighter number of SKUs
and
b) Do enough volume to control and change what the original equipment manufacturers are producing
The problem is that there's only so many companies that truly design and manufacture photographic sensors, lenses and LCD panels. And all the downstream "brands" that assemble this technology into cheap plastic cases to sell to consumers can only do so much to differentiate. Add neon lights for gamers. Make it look dull for business users. Etc. They also sell TVs and have thousands of other SKUs, so they really don't care about any individual product.
Apple is both incentivized (due to their ongoing customer relationships) and able to break out of this mold because they:
a) Produce a tighter number of SKUs
and
b) Do enough volume to control and change what the original equipment manufacturers are producing