.Una Due Tfc,
Thanks for providing that reference. I wasn't aware of that requirement, but thanks to PPRuNe I'm learning every day.
Just to be pedantic, your reference is an operating rule and not a certification requirement, and doesn't apply to airplanes operated under Part 121.
The operating rule obviously needs to be changed as soon as airplanes are certificated without pitots . However, that will not be soon. An airspeed indicator without pitots is highly unusual. Anyone who wants certification for such a system will have to provide evidence that it is at least as reliable as a more conventional system and meets the requirements for accuracy. It also needs to indicate airspeed adjusted for air density (CAS).