I'd hope it will eventually be touch, not force, sensitive.
Well, the reason it isn't touch sensitive is there isn't any sensor in the wheel that would provide that capability. It can only detect torque so you have to provide resistance against the wheel.
So while many things in a Tesla do indeed get better over time (hello OTA updates!), this is a situation where it would require Tesla to put some new hardware (i.e. a different steering wheel and sensor, likely) to get that capability.
Maybe 'eventually' they will decide to rev the hardware and do this. Or they may decide to go the camera monitoring the driver way like Cadillac does.
Model 3 does have an interior-facing camera. Rumor has it that it 'aimed' at the cabin as a whole to (eventually, when it is turned on) provide users on the "Tesla Network" some re-assurance that people in their cars aren't dirtying it up or doing inappropriate things in there (i.e. it is nanny-cam type camera for passengers). But I am not sure anyone knows for sure. Maybe it is possible for that interior cam to be used for driver attention duties, but I personally don't think so. My logic is that the complaining about nagging is so strong (or at least from a vocal minority) that IF Tesla COULD use that Model 3 interior camera for driver attention purposes, I'd think it WOULD.