As far as keyboards go, there are mechanical keyboards and then there's everything else. For those not very knowledgeable about mechanical keyboards (and thus keyboards in general), give this a read.
So how are keyboards behind? At least as of late 2016 we have seen mechanical keyboards creep down into more affordable price ranges (around $60), offering quality that non-mechanical keyboards can't even dream of. But that's not enough. First and foremost, more keyboards need a lower profile chassis design to make cleaning much easier, like the keyboard pictured at the top of this page (a custom model from GON's keyboard works) or like Corsair's models. Furthermore, we need more design variety with mechanical keyboards. Many people like low profile laptop-style keycaps, so some mechanical keyboards (affordable ones too) should come with those by default, just to open up to wider audiences.
People also like silent typing, so o-rings (rubber o-rings installed inside the keycap to absorb sound and soften impact) should be standard on "silent" models, which is a niche that needs to be created in the mechanical keyboard market.
But let's get to the good stuff, the real technological revolution since everything above can be done already just by buying aftermarket keycaps and o-rings. Analog mechanical switches, utilizing IR LEDs to create what is essentially a pressure sensitive switch, without relying on capacitive membranes like standard keyboards or controller buttons. A far more reliable and responsive alternative still providing greater functionality. Refer to the proposed design below from Aimpad.
Such a switch would feel no different than recognizable Cherry mechanical switches, but would provide benefits for gaming thanks to greater functionality. An example of such an improvement would be, in a game hold the W key lightly to walk, and hold it all the way to run. The same would apply to all player movements, also in vehicles. And before anyone says it, no, the key press is not longer with such switches. These analog mechanical switches have three activation points across the standard length key press.
Other games would come up with their own use of such keyboard switches. Most games that have no separate walk key would no longer suffer, as these switches would enable different levels of movement like walking and running.
Aimpad never reached its Kickstarter goal and other variations of analog mechanical switches never made it beyond the prototype stage. At least RGB LED backlighting is becoming a standard, and at least mechanical keyboard prices are continuously trickling down, but the keyboard industry is still at a crawl. Although it is not as stuck in the mud as game controllers of course.