To add to the list of daft ideas:
Hybrid ceramic bearings with UD carbon DLC coated races. That would make them a lot lighter and virtually frictionless.
Carbon fibre bolts.
Lighter than current plastic bottles made of CF. Not sure that's feasable....
Truly affordable, light and stiff brakes.
Someone willing to set up a business making custom (as in made for you, the customer and not for a non-existing imaginary bottom) carbon fibre saddles.
A light SMP clone would be a good start.....
A handlebar tape made of true CF cloth iso the faux carbon stuff that's actually lighter than or as light as current and comfy stuff. (Told you this is the daft idea list, did I?)
A carbon fibre anti-gravity device so I for once can reach the top of that mole hill without killing myself.....(scrap this idea)
Addendum: a range of carbon rims that are steellike flexible in the vertical plane but ueber-stiff laterally would be nice too. Maybe a dot of basalt fibre in the mix?
Bottomline being most rims just don't filter out any road buzz out, they just tend to induce rider fatigue for no good reason.
One could expand on this to include frame and other peripherals especially at the points of contact areas (handlebar-seat- and to a lesser extent pedals). A frame that could truly break up and filter out resonant spikes may help as well but I think it's more reasonable to look at the above mentioned points of contact first.
After all Newton's first law never stated the reaction to the action has to be immediate and hurt you so if we could smear the impact of that pothole out in time....