[Si Coe]

I assume you are refering to something like the platform damped shocks used on mountain bikes - which actually originated on real offroaders. These use variable pressure valves on the pistons to make the shock massively stiff (due to being over damped) to slow compression forces (such as those in cornering or accelerating) , but can be very soft and smooth for fast impacts (such as a bump).
Perfected it would allow you to set the car really soft for riding over bumps, without fear of it pitching and rolling into corners.

Basically the technology is simple enough that it could be fitted into an RC sized shock, but it wouldn't be possible to fit external adjustments (as on mtb shocks) and it would have to be a sealed unit (no oil changes) so ulitimately its not as good as we have now.